No, vector field g exists on R^3 that has the given curl i.e. g = xyz, −y3z2, y2z3
To determine if such a vector field exists, we need to compute the curl of g. Let g = <f(x,y,z), g(x,y,z), h(x,y,z)> be the vector field we are looking for.
Then the curl of g is given by:
curl g = (∂h/∂y - ∂g/∂z, ∂f/∂z - ∂h/∂x, ∂g/∂x - ∂f/∂y)
Setting this equal to <xyz, -y^3z^2, y^2z^3>, we obtain the following system of partial differential equations:
∂h/∂y - ∂g/∂z = xyz
∂f/∂z - ∂h/∂x = -y^3z^2
∂g/∂x - ∂f/∂y = y^2z^3
Taking the partial derivative of the first equation with respect to z and the third equation with respect to y, we get:
∂/∂z (∂h/∂y) - ∂/∂y (∂g/∂x) = xz^2
∂/∂y (∂g/∂x) - ∂/∂x (∂f/∂y) = 2yz^3
Since the order of differentiation does not matter, we can equate these two expressions and get:
∂/∂z (∂h/∂y) - ∂/∂x (∂f/∂y) = xz^2 - 2yz^3
This gives us another partial differential equation that needs to be satisfied by the components of g. However, when we compute the partial derivative of the second equation with respect to y and the third equation with respect to x, we obtain:
∂/∂y (∂f/∂z) - ∂/∂z (∂h/∂y) = 0
∂/∂x (∂g/∂z) - ∂/∂z (∂f/∂x) = 0
These equations imply that the mixed partial derivatives of f, g, and h are equal, which is not true for the given curl. Therefore, no vector field g exists on R^3 that has the given curl.
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Mrs. Garcia wants to put a title border along one side of her kitchen wall Mrs. Garcia measures the wall and knows that she needs enough tiles to make three rows with 63 tiles in each row how many more tiles does Miss Garcia need to make the border tiles cell in boxes of eight tiles in each box how many boxes Tiles does Mrs. Garcia need to buy Write equations to support your mathematical thinking
The equation to support the mathematical thinking will be x + 189 = 192 and the numbers needed is 3.
How to calculate the value?It should be noted that the information stated that she needs enough tiles to make three rows with 63 tiles in each row. The number of times needed will be:
= 63 × 3
= 189 tiles
The number of times that Miss Garcia need to make the border tiles cell in boxes of eight tiles in each box will be:
= 192 - 189 = 3
Therefore, 3 tiles are needed. It should be noted that 192 is the multiple of 8 closest to 189.
The equation to support the mathematical thinking will be:
x + 189 = 192
x = 192 - 189
x = 3
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What is the remainder when x^4 + 7 is divided by x - 3
Answer:
Let f(x)=x
4
+4x
3
−5x
2
−6x+7.
Let R be the remainder obtained when f(x) is divided by x+3.
Equate x+3 to 0 and put the value of x in f(x).
x+3=0
⟹x=−3
R=(−3)
4
+4(−3)
3
−5(−3)
2
−6(−3)+7
=81−108−45+18+7
=−47
Thus required remainder is −47
Can someone please help me on this
5z+3y-15x+9
The factorized expression of 5z + 3y - 15x + 9 is 5(z - 3x) + 3(y + 3)
How to evaluate the expression?The expression is given as
5z+3y-15x+9
Rewrite the above expression properly
So, we have
5z + 3y - 15x + 9
Regroup the expression, as follows
So, we have:
5z + 3y - 15x + 9 = 5z - 15x + 3y + 9
Factorize the expression, as follows
So, we have:
5z + 3y - 15x + 9 = 5(z - 3x) + 3(y + 3)
Hence, the factorized expression of 5z + 3y - 15x + 9 is 5(z - 3x) + 3(y + 3)
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Mrs Mabaspacked , prudence's mom packed a cooler box bag for the day of the painting . Two six pack cans fit exactly on top of each other in the cooler bag. A can has a diameter of 6 cm and a height of 8,84 cm 0:41 EZ07/67/90 dy the information given in the information above and answer the questions that follow. 2.1 2.2 2.3 2.4 Calculate the volume in ml of one can of cold drink, rounded to the nearest whole number. Determine the height of the cooler bag, rounded to the nearest whole number. Determine the volume in ml of the cooler bag if the breadth of the bag is 12 cm and the length 18 cm. Each can have a label on them as shown by the image below Piesse Circumference of the can NEW Diet, Soda 0 Calories! Calculate the length of the lable. CALORIES PER SERVING Nutrition Fac Hight of the can (3) (2) (3) (2) 27 [10]
2.1 The volume in ml of one can of cold drink is 83 ml.
2.2 The height of the cooler bag is 18 cm.
2.3 The volume in ml of the cooler bag if the breadth of the bag is 12 cm and the length 18 cm is 3,888 ml.
2.4 The circumference of the can is 18.84 cm.
How to calculate the volume of a cylindrical can?In Mathematics and Geometry, the volume of a cylinder can be calculated by using this formula:
Volume of a cylinder, V = πr²h
Where:
V represents the volume of a cylinder.h represents the height or length of a cylinder.r represents the radius of a cylinder.By substituting the given side lengths into the volume of a cylinder formula, we have the following;
Volume of can = 3.14 × (6/2)² × 8.84
Volume of can = 83.27 cm³.
Note: 1 cm³ = 1 ml
Volume of can in ml = 83.27 ≈ 83 ml.
Part 2.2.
For the height of the cooler bag, we have:
Height of cooler bag = 2 × height of can
Height of cooler bag = 2 × 8.84
Height of cooler bag = 17.68 ≈ 18 cm.
Part 2.3
Volume of cooler bag = length × breadth × height
Volume of cooler bag = 18 × 12 × 18
Volume of cooler bag = 3,888 ml.
Part 2.4
The circumference of the can is given by:
Circumference of circle = 2πr
Circumference of can = 2 × 3.14 × 3
Circumference of can = 18.84 cm.
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Missing information:
The question is incomplete and the complete question is shown in the attached picture.
if we are given a right-tail probability (or area) a and want a measurement m, which function in excel should we use? assume that the mean of the distribution is mu and the standard deviation is sigma.
The function in Excel that we should use to find a measurement M given a right-tail probability (or area) A is = NORM.INV(1-A, mu, sigma)
In order to find a measurement M given a right-tail probability A in Excel, we can use the NORM.INV function. The NORM.INV function in Excel returns the inverse of the normal cumulative distribution for a given probability.
The formula for NORM.INV function is:
= NORM.INV(1-A, mu, sigma)
where:
A is the right-tail probability (or area)
mu is the mean of the distribution
sigma is the standard deviation
The function returns the measurement M such that the right-tail area from M to infinity under the normal curve is equal to A.
Note - In some versions of Excel, the function may be called NORM.INV.RT instead of NORM.INV.
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Please help. I don’t understand the problem.
Answer:
ASA
Step-by-step explanation:
ASA stands for Angle-Side-Angle which is the congruency theorem that states that if a triangle shares two congruent angles that have one line in between the two angles share a side length congruent to each other, then the two triangles are congruent.
Before you get very confused on the difference between AAS (Angle-Angle-Side) and ASA (Angle-Side-Angle), let explain why these two triangles are ASA.
We are given that both triangles share a similar side length at KL where they are connected. We are also given that angle ∠JKL is congruent to angle ∠MKL. We are also given that angle ∠MLK is congruent to angle ∠JLK.
The most important part after deciding all the relationships is given to us, it is deciding what kind of congruence theorem we will use. We are given the options:
SSS (Side-Side-Side) SAS (Side-Angle-Side) ASA (Angle-Side-Angle) AAS (Angle-Angle-Side) HL (Hypotenuse-Leg)Because we are presented with two congruent angles and one congruent side, we know that this triangle congruency theorem is either ASA or AAS. To understand why these triangles are ASA, we have to look at where the two-given congruent sides are located. As we can see in the name and in our two triangles, the congruent side lengths are in between the two angles as it touches both angle ∠JKL and angle ∠JLK in triangle ΔJKL, while in on ΔMKL, the congruent side length is also found between angle ∠MLK and angle ∠MKL. So, these triangles share ASA because they share two congruent angles connected by one congruent line.
ORDER MATTERS WHEN YOU WRITE YOUR CONGRUENCY THEROMS
AAS is technically not the same as ASA and I will explain that in one moment.
An example of AAS is if instead being told that ∠JKL is congruent to angle ∠MKL, we are given that ∠KJL is congruent to angle ∠KML instead. now the congruent sides are not connected to angle ∠KJL or angle ∠KML. The side is no longer in-between the two congruent sides. The reason order matters here are because order matters between AAS and ASA because in another theorem, SAS, you will find out order matter because while SAS guaranties congruency SSA does not. Technically, though, while both AAS and ASA both guaranty congruency, they are labeled separately, the way the remaining congruency thermos are.
Suppose x = 1, y = -1, and z = 1. What is the output of the following statement? (Please indent the statement correctly first.)
if (x > 0)
if (y > 0)
System.out.println("x > 0 and y > 0");
else if (z > 0)
System.out.println("x < 0 and z > 0");
A. x > 0 and y > 0;
B. x < 0 and z > 0;
C. x < 0 and z < 0;
D. no output
Based on the evaluation of the conditions, the output "x < 0 and z > 0" will be printed. Therefore, the correct answer is B. x < 0 and z > 0.
The correct indentation of the statement would be as follows:
if (x > 0)
if (y > 0)
System.out.println("x > 0 and y > 0");
else if (z > 0)
System.out.println("x < 0 and z > 0");
Given that x = 1, y = -1, and z = 1, let's evaluate the conditions:
The first if statement checks if x > 0, which is true since x = 1.
Since the condition in the first if statement is true, we move to the inner if statement, which checks if y > 0. However, y = -1, so this condition is false.
The inner if statement is followed by an else if statement that checks if z > 0. Since z = 1, this condition is true.
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. For which values of a and b is the following system consistent {x+2y=a3x+6y=b A. a=1,b=3 B. a=3,b=1 C. a=1,b=4 D. a=4,b=1
The system is consistent for all values of a and b.
To determine the values of a and b for which the system is consistent, we need to solve the system of equations and check if there is a unique solution, infinitely many solutions, or no solution.
The given system of equations is:
x + 2y = a
3x + 6y = b
We can rewrite the second equation as:
3(x + 2y) = b
Dividing both sides by 3, we get:
x + 2y = b/3
Now we have two equations:
x + 2y = a
x + 2y = b/3
If the slopes (coefficients of x and y) of the two equations are equal, then the system will have infinitely many solutions. If the slopes are not equal, then the system will have no solution.
Comparing the coefficients of x and y in both equations, we have:
1 = 1
2 = 2
The slopes are equal, which means the system will have infinitely many solutions for any values of a and b.
Therefore, the correct answer is not provided in the given options. The system is consistent for all values of a and b.
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Tianna is designing a quilt block. She will cut from two different sizes of
rectangular fabric scraps to create a spiral pattern. Which rectangular
scrap has the longer diagonal?
V149 in.
7 in.
12.2 in.
2.2 in.
10 in.
12 in
1. What does the problem ask you to do?
Answer: uh I think its a carrot, sorry i hope this could maybe help :)
Step-by-step explanation:
help me
I need someone..
plsss..
i need the perimeter of this two asap!!
u will get the brainlezt for the best answer
Answer:
a. 44 cm b. 126 cm
Step-by-step explanation:
a. it is semi circle
perimeter is πd
22/7*14
44 cm
b. it is equilateral triangle
so perimeter is side* 3
42 *3 = 126cm
Answer:
(a) 44 cm (b) 214 cmStep-by-step explanation:
(a)
The figure perimeter it is half of a circle with a diameter d₁=14 cm and two halfs of circle with a diameter d₂=14 cm÷2=7 cm.
The length of a circle is L₀ = πd, where d is the diameter.
Therefore:
\(\bold{L=\frac12d_1+2\cdot\frac12d_2 = \frac12\cdot14\pi+\frac12\cdot2\cdot7\pi=14\pi\,cm\approx44\,cm}\)
(b)
A full circle it is 360°, so the circle sector of 60° is \(\frac{60^o}{360^o}=\frac16\) of the circle. So the arc of 60° is ¹/₆ of the full circle length.
The figure is an equilateral triangle and two 60°-sectors of circles with radiuses of length of the triangle's side (r=42 cm).
Its perimetr it's two radiuses, two arcs of 60° and one side of the triangle.
The length of a circle is L₀ = 2πr, where r is a radius.
Therefore:
\(\bold{L=2r+2\cdot\frac16\cdot 2\pi r+r=3r+\frac23\pi r}\\\\\bold{L=3\cdot42+\frac23\pi\cdot42=(126+28\pi)\,cm\approx214\,cm}\)
Suppose that the speed (in m/sec) of a particle
moving on the x-axis at time t seconds (t ≥0)
is given by:
V(t) = 3 - 8t2 + 15t + 10
Find V(3).
A) 15 m/sec
B) 10 m/sec
C) 25 m/sec
D) 20 m/sec
To find V(3), we need to substitute t=3 in the given equation for V(t).
V(3) = 3 - 8(3)^2 + 15(3) + 10
V(3) = 3 - 72 + 45 + 10
V(3) = -14 m/sec
Therefore, none of the given options (A, B, C, or D) are correct.
The given equation for V(t) gives the speed of the particle at any time t on the x-axis. We need to find the speed of the particle at time t=3 seconds.
Substituting t=3 in the given equation for V(t), we get V(3) = 3 - 8(3)^2 + 15(3) + 10 = -14 m/sec. Therefore, none of the given options are correct.
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Find the function with the given derivative whose graph passes through the point P. f' (x) = 2x - 5, P (- 4, 2) The function with the given derivative whose graph passes through the point P is f (x) =
The function with the given derivative whose graph passes through the point P is: f(x) = x² - 5x - 34.
How we find the function?To find the function f(x) with the given derivative f'(x) = 2x - 5 that passes through the point P(-4, 2), we need to integrate the derivative to obtain the original function.
Integrating f'(x) = 2x - 5 with respect to x, we get:
f(x) = ∫(2x - 5) dx = x² - 5x + C,
where C is the constant of integration.
To determine the value of C, we can use the fact that the graph of the function passes through the point P(-4, 2). Substituting x = -4 and f(x) = 2 into the equation, we have:
2 = (-4)² - 5(-4) + C
2 = 16 + 20 + C
2 = 36 + C
C = 2 - 36
C = -34.
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Find the length of AN A has coordinates (-4,-7), and N has coordinates (1,5)
The answer is 13 by using Pythagorean theorem.
when a satellite reads radiation from a mountain the amount of radiation it observes is distributed n(490, 2916) (units are msv). a spy satellite has detected a radiation level of 599 from a mountain known to have terrorists. assuming there is no nuclear danger here, what is the probability of a random radiation measurement being 599 or higher?
The probability of a radiation measurement of 599 or higher from a mountain known to have terrorists, assuming no nuclear danger, is about 0.0668.
How to find the probability?We are given that the radiation levels observed by the satellite are normally distributed with a mean of 490 and a variance of 2916. We want to find the probability of a random radiation measurement being 599 or higher, assuming there is no nuclear danger.
First, we need to standardize the radiation level of 599 using the formula:
z = (x - mu) / sigma
where x is the radiation level, mu is the mean, and sigma is the standard deviation. Substituting the values we have:
z = (599 - 490) / √(2916) = 1.5
Now, we can use a standard normal distribution table or calculator to find the probability of a z-score of 1.5 or higher. The table or calculator will give us the area under the standard normal curve to the right of 1.5.
Using a calculator, we can find this probability as follows:
P(Z > 1.5) = 0.0668 (rounded to four decimal places)
Therefore, the probability of a random radiation measurement being 599 or higher is approximately 0.0668, assuming there is no nuclear danger.
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On a map, 3 centimeters represents 150 kilometers. If a line between two cities measures 4.5 centimeters, how many kilometers apart are they
Answer: 225km
Step-by-step explanation:
3cm --- 150
1cm ---- 50
Therefore 4.5cm * 50 = 225km
(30 points) please help! Point B is between A and C. AB = 2x + 1 and BC = 3x. If the measure of AC is 41, what is the value of x?
Answer:
x=8
Step-by-step explanation:
just do 5x+ 1 =41 solve and your done
Answer:
x=8
Step-by-step explanation:
I took a quiz with this question and got it right
What is the solution to the equation below?
4w=2/3
A
6/3
B
8/3
C 2/12
D 4 2/3
THESE ARE FRACTIONS
Answer:
I think it is 2/12
On a map's coordinate grid, Milton City is located at (-4,-3) and McDanielsville is located at(4, -9). How long is a train's route as the train travels along a straight line from Milton City to McDanielsville?
Given :
On a map's coordinate grid, Milton City is located at (-4,-3) and McDanielsville is located at(4, -9).
To Find :
How long is a train's route as the train travels along a straight line from Milton City to McDanielsville .
Solution :
We need to find the distance between points (-4,-3) and (4,-9) .
Now , distance between two points (x,y) and (a,b) is given by :
\(D=\sqrt{(x-a)^2+(y-b)^2}\)
For points (-4,-3) and (4,-9) distance between them is :
\(D=\sqrt{(4-(-4))^2+(-9-(-3))^2}\\\\D=\sqrt{8^2+6^2}\\\\D=10 \ units\)
Therefore , distance travelled by train is 10 units .
Hence , this is the required solution .
calculate the taylor polynomials 2 and 3 centered at =0 for the function ()=16tan().
Taylor polynomials of degree 2 and 3 centered at x = 0 for the function f(x) = 16tan(x) are:
P2(x) = 16x + 8x^2
P3(x) = 16x + 8x^2
To find the Taylor polynomials centered at x = 0 for the function f(x) = 16tan(x), we can use the Taylor series expansion for the tangent function and truncate it to the desired degree.
The Taylor series expansion for tangent function is:
tan(x) = x + (1/3)x^3 + (2/15)x^5 + (17/315)x^7 + ...
Using this expansion, we can find the Taylor polynomials of degree 2 and 3 centered at x = 0:
Degree 2 Taylor polynomial:
P2(x) = f(0) + f'(0)(x - 0) + (1/2!)f''(0)(x - 0)^2
= 16tan(0) + 16sec^2(0)(x - 0) + (1/2!)16sec^2(0)(x - 0)^2
= 0 + 16x + 8x^2
Degree 3 Taylor polynomial:
P3(x) = P2(x) + (1/3!)f'''(0)(x - 0)^3
= 0 + 16x + 8x^2 + (1/3!)(48sec^2(0)tan(0))(x - 0)^3
= 16x + 8x^2
Therefore, the Taylor polynomials of degree 2 and 3 centered at x = 0 for the function f(x) = 16tan(x) are:
P2(x) = 16x + 8x^2
P3(x) = 16x + 8x^2
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Simplify
-4r + S - 2r - 3s
Answer:-6s-2r
Step-by-step explanation:
you must add all like terms in this case S -4-3 is -7. -7+1=-6.
-6s-2r
Answer:
-6r - 2s
Step-by-step explanation:
Given expression,
→ -4r + s - 2r - 3s
Let's simplify the expression,
→ -4r + s - 2r - 3s
→ (-4r - 2r) + (s - 3s)
→ -6r + (-2s)
→ -6r - 2s
Hence, the answer is -6r - 2s.
f(x) = 3(x + 1)2 – 27.
Answer:
x=7
2
Step-by-step explanation:
0=6 (x+1) –27
Remove the parentheses
0=6x+6 ‐27
Calculate
0=6×‐21
Move the variable to left
‐6x=21
Divide both sides
write the full set of vectors x ∈ r3 for which 1 0 0 , 0 1 0 , x is a basis for r3
The set of vectors x ∈ R3 for which 1 0 0, 0 1 0, x is a basis for R3 is given by all vectors x that are linearly independent from 1 0 0 and 0 1 0, and have at least one non-zero component.
To find the set of vectors x ∈ R3 for which 1 0 0 , 0 1 0 , x is a basis for R3, we need to find the vector x that completes the basis for R3.Since the basis for R3 consists of three linearly independent vectors, the vector x must also be linearly independent from the first two vectors, 1 0 0 and 0 1 0. This means that x cannot be a linear combination of the first two vectors, and must have at least one non-zero component.
Let x = [x1, x2, x3] be the vector that completes the basis for R3. Then, we can write any vector v ∈ R3 as a linear combination of the basis vectors as:
v = a1 [1 0 0] + a2 [0 1 0] + a3 [x1 x2 x3]
where a1, a2, and a3 are scalars.
Since the basis vectors are linearly independent, this equation has a unique solution for any vector v ∈ R3. Therefore, the set of vectors x ∈ R3 for which 1 0 0 , 0 1 0 , x is a basis for R3 is given by all vectors x that are linearly independent from 1 0 0 and 0 1 0.
One way to express this set of vectors is as follows:
x = [x1, x2, x3] ∈ R3 such that x1 ≠ 0 or x2 ≠ 0 or x3 ≠ 0.
In other words, the vector x can have any value in R3, as long as it has at least one non-zero component.
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The cost of admission to history museum is 3. 25$ per person over the age of 3; kids 3 and under get in for free. If the total cost of admission for the warrick family, including their two 6-month old twins, is 19. 50, find how many family members are over 3 years
There are 6 family members over 3 years old.
Let's assume that the number of family members over 3 years old is "x".
The cost of admission for each family member over 3 years old is $3.25. Since the twins are 6 months old, they are not counted in the total cost of admission. Therefore, the total cost of admission for the family, including the twins, is $19.50.
The equation representing the total cost of admission can be set up as:
3.25x = 19.50
To find the value of "x," we can divide both sides of the equation by 3.25:
x = 19.50 / 3.25
x = 6
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A smartphone regularly sells for $125. It is on sale this week for $85. The sale
price is what percent of the regular price?
Answer:
68%
Step-by-step explanation:
85 divided by 125 = .68 * 100 = 68
Answer: The sale price is 40 percent of the regular price
Step-by-step explanation:
Determine whether the given value is from a discrete or continuous data set. when a truck is randomly selected, it is found to have a length of 20 feet.
The length of a truck is an example of a continuous data set, and 20 feet is just one possible value within that range.
The given value, "a truck with a length of 20 feet," is an example of a continuous data set.
Continuous data refers to values that can take on any numerical value within a range, with no gaps or interruptions. In this case, the length of a truck can take on any value between 0 and some maximum length, with no gaps or interruptions in between.
In contrast, discrete data refers to values that can only take on certain specific values, usually integers. For example, the number of tires on a truck is a discrete data set because it can only take on integer values (e.g. 4, 6, 8).
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The weekly salaries of a sample of employees at the local bank are given in the table below. Employee Weekly Salary Anja $245 Raz $300 Natalie $325 Mic $465 Paul $100 What is the variance for the data? Variance: s squared = StartFraction (x 1 minus x Overbar) squared (x 2 minus x Overbar) squared ellipsis (x n minus x Overbar) squared Over n minus 1 EndFraction 118. 35 132. 32 14,006 17,507. 5.
The variance for the data is 17,507. 5.
Given
The weekly salaries of a sample of employees at the local bank are given in the table below.
Employee Weekly Salary Anja $245 Raz $300 Natalie $325 Mic $465 Paul $100.
VarianceVariance is the expected value of the squared variation of a random variable from its mean value, in probability and statistics.
The mean value of the salaries of employees is;
\(\rm Mean= \dfrac{245+300+325+465+100}{5}\\\\Mean=287\)
The variance is given by;
\(\rm Variance=\sqrt{\dfrac{(245-287)^2 +(300-287)^2 +(325-287)^2 +(465-287)^2 +(100-287)^2}{5-2}} \\\\Variance = 132.316}\\\\On \ Squaring \ both \ the \ sides\\\\Variance^2=17,507. 5\)
Hence, the variance for the data is 17,507. 5.
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Answer:
17,507.5
Step-by-step explanation:
The answer above is correct.
in Arrietican roulette, the wheel contains the numbers 1 through 36 , alternating between black and red. There are two green spaces numbered 0 and 00 . A piayer places a bet of $1.50 on red to play the game. If the ball lands on red, the piayer gets a $1.50 for winning and receives the money back: if the bult does not land on redi, then the player samply loses the $1.50 placed on the bet Calculate the expected winnings on one game. Aound your answer to the nearest cent.
The expected winnings on one game is $0.
To calculate the expected winnings, we need to consider the probabilities of winning and losing, as well as the corresponding amounts won or lost.
In American roulette, there are 18 red numbers out of a total of 38 possible outcomes (including 0 and 00).
The probability of winning by landing on red is therefore 18/38.
If the ball lands on red, the player receives the initial bet amount of $1.50 back, resulting in a net winning of $1.50.
On the other hand, there are 20 outcomes (0 and 00, as well as black numbers) that result in a loss for the player.
The probability of losing is therefore 20/38.
In this case, the lose the $1.50 bet.
To calculate the expected winnings, we multiply the probability of winning by the amount won and subtract the probability of losing multiplied by the amount lost.
In this case, it would be:
Expected winnings = (Probability of winning) * (Amount won) + (Probability of losing) * (Amount lost)
= (18/38) * $1.50 + (20/38) * (-$1.50)
= $0
Therefore, the expected winnings on one game in American roulette, when betting $1.50 on red, is $0.
This means that on average, over multiple games, the player neither gains nor loses money.
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correct or incorrect? the difference of two numbers is always less than at least one of the numbers
If the point (-7, 5) lies on the graph of y=f(x), which of the following points must lie on the graph of its inverse?
(1) (5,-7)
(2)(-1/7,1/5)
(3)(7,-5)
(4)(1/7,-1/5)
By using the inverse function definition and the fact that: f⁻¹(y) = x, we will see that the point that must be on the inverse function is (5, -7)
What are two inverse functions?For an invertible function f(x), we define its inverse f⁻¹(x) such that:
if f(x) = y
then:
f⁻¹(y) = x
And because of that, we have the properties:
f(f⁻¹(x) ) = x
f⁻¹( f(x)) = x
Then if the point (-7, 5) is on the function f(x), this means that:
f(-7) = 5
And using the inverse property, we know that:f⁻¹(5) = -7
Then the point that lies on the inverse function is (5, 7), the correct option is the first one.
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