PLEASE HELPPPPP SOOOONNNNN
Mr. Sanchez’s class sold Snickers for $1.50 each and Mr. Kelly’s class sold bottles of fruit juice for $1.26 each. Together, the classes sold 82 items and earned $115.56 for their school.
(a) Write and solve a system of equations that model the problem. Show all your work.
X*1.50+Y*1.26= 115.56
(b) Which class earned more money?
(c) How much more money did that class earn?
Answers
Answer:
Mr. Kellys class sold more fruit juice I think. I could be wrong but i am pretty sure that is the answer!
Step-by-step explanation:
Related Questions
Match each of the equations with their corresponding graph
Answers
Answer:
equation a and graph E
equation b and graph a
equation c and graph b
equation d and graph D
Step-by-step explanation:
What is the rate of increase in water pressure in atm/km
Answers
Answer:
Rate of increase in water pressure is 992
Step-by-step explanation:
A store is selling T-shirts. Which is the best deal?
8 for $26
5 for $30
4 for $15
12 for $39
10 for $45
Answers
divide cost by quantity. The lowest rate is the best buy:
26/8 = 3.25 each
30/5 = 6.00 each
15/4 = 3.75 each
39/12 = 3.25 each
45/10 = 4.50 each
The 8 for 26 and the 12 for 39 are both the same price each and are the better buys.
How many times will this tire with the size 33 x 12.5 R15 rotate over 10,000 miles?
Answers
We'll divide the total distance (10,000 miles) by the circumference in miles. This results in approximately 6,097,560 rotations. So, the tire will rotate about 6,097,560 times over 10,000 miles.
We need to consider three factors: the size of the tire, the distance traveled, and the rotations per mile. The tire size given is 33 x 12.5 R15. This means that the tire has a diameter of 33 inches and a width of 12.5 inches, with a 15-inch rim. You have stated a distance of 10,000 miles. We need to determine the rotations per mile. To do this, we need to calculate the circumference of the tire, which is given by the formula 2 x pi x radius. Since the radius is half of the diameter, it is 16.5 inches (33/2). Thus, the circumference is approximately 103.67 inches (2 x 3.14 x 16.5).
We need to convert the distance of 10,000 miles into inches. One mile is approximately 63,360 inches, so 10,000 miles is equal to 633,600,000 inches. We can calculate the number of rotations by dividing the total distance by the circumference of the tire. Therefore, the tire will rotate approximately 6,112,661 times (633,600,000 / 103.67). We find that the circumference of the tire is C = π(33) ≈ 103.67 inches. To convert this to miles, we'll use the conversion factor of 1 mile = 63,360 inches. Therefore, the circumference in miles is approximately 0.00164 miles.
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4 times a number is 12 less than the square of that number. Find the positive solution
Answers
Answer:
I think its 6
im not 100%sure
Step-by-step explanation:im in 7th grade tho
But can i get brainless
Answer:
6
Step-by-step explanation:
Have a good day :)
\(x^{2} -x-6\)
![[tex]x^{2} -x-6[/tex]](https://i5t5.c14.e2-1.dev/h-images-qa/contents/attachments/mcm7dZ4SkHTylQCULkO9vlIxo6ThKnrl.png)
Answers
Answer:
1. (x-3)(x+2)
2. (x-5)(x-3)
3. x= 2,1
4. x= -2,-4
5. x= 3,-7
6. x= 1,-8
7. x= 5,-7
8. x= -1/3,-2
Step-by-step explanation:
step by step solution to 10x-7y=-8
Answers
The x and y-intercept of the linear equation 10x - 7y = -8 in an ordered pair form are ( -4/5, 0 ) and ( 0, 8/7 ) respectively.
How to determine the x and y-intercept of the linear equation?The intercept of a line on a graph is simply the point at which it intersects either the x-axis or y-axis.
Given the data in the question;
10x - 7y = -8x-intercept = ?y-intercept = ?To find the x-intercept, substitute in 0 for y and solve for x.
10x - 7y = -8
10x - 7(0) = -8
10x - 0 = -8
10x = -8
Divide both sides by 10
10x/10 = -8/10
x = -8/10
x = -4/5
Therefore, the x-intercept is ( -4/5, 0 ).
To find the y-intercept, substitute in 0 for x and solve for y.
10x - 7y = -8
10(0) - 7y = -8
0 - 7y = -8
-7y = -8
Divide both sides by the coefficient of y
-7y / -7 = -8 / -7
y = -8 / -7
y = 8/7
Therefore, the y-intercept is ( 0, 8/7 ).
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an athlete runs 8 miles from their house to the store on a path. the athlete then runs to a point m miles from their house on the same path. the athlete decides to finish the run by returning to the store. the athlete ran a total of 16 miles. formulate an absolute value equation to represent this situation. then solve the equation.
Answers
y=5x-7
-3x-2y=-12
Find x
Answers
Answer:
11/6=x
Step-by-step explanation:
System of Linear Equations entered :
[1] y=5x-7
[2] -3x-3y=-12
Equations Simplified or Rearranged :
[1] y - 5x = -7
[2] -3y - 3x = -12
Graphic Representation of the Equations :
-5x + y = -7 -3x - 3y = -12
Solve by Substitution :
// Solve equation [1] for the variable y
[1] y = 5x - 7
// Plug this in for variable y in equation [2]
[2] -3•(5x-7) - 3x = -12
[2] - 18x = -33
// Solve equation [2] for the variable x
[2] 18x = 33
[2] x = 11/6
// By now we know this much :
y = 5x-7
x = 11/6
// Use the x value to solve for y
y = 5(11/6)-7 = 13/6
Solution :
{y,x} = {13/6,11/6}
if i can give brainliest, i will! please help!
Data was collected on the amount of time that a random sample of 8 students spent studying for a test and the grades they earned on the test. A scatter plot and line of fit were created for the data.
scatter plot titled students' data, with points plotted at 1 comma 80, 2 comma 70, 2 comma 80, 2 comma 90, 3 comma 80, 3 comma 100, 4 comma 90, and 4 comma 98, and a line of fit drawn passing through the points 0 comma 70 and 1 comma 75
Find the y-intercept of the line of fit and explain its meaning in the context of the data.
80; a student who studies for 0 hours is predicted to earn 80% on the test
70; a student who studies for 0 hours is predicted to earn 70% on the test
10; for each additional hour a student studies, their grade is predicted to increase by 10% on the test
5; for each additional hour a student studies, their grade is predicted to increase by 5% on the test
Answers
An equation of the line of fit include the following: A. y = 5x + 70
How to determine an equation of this line?
In Mathematics, the point-slope form of a straight line can be calculated by using this mathematical expression:
y - y₁ = m(x - x₁) or y - y₁ = (y₂ - y₁)/(x₂ - x₁)(x - x₁)
Where:
m represents the slope.
x and y are the points.
At data point (0, 70), a linear function in standard form for this line can be calculated by using the point-slope form as follows:
y - y₁ = (y₂ - y₁)/(x₂ - x₁)(x - x₁)
y - 70 = (75 - 70)/(1 - 0)(x - 0)
y - 70 = 5(x - 0)
y = 5x + 70
Answer:
An equation of the line of fit include the following: A. y = 5x + 70
Step-by-step explanation:
A ball is thrown upwards in the air. The height h(t) in feet, of the ball above ground t seconds after being thrown is determined by the expression: h(t)=-16t^2+20t+2.
Answers
The maximum height is 8.25 feet, which is after 0.625 seconds
What is an equation?
An equation is an expression that shows the relationship between two numbers and variables using mathematical operations like addition, subtraction, multiplication, exponents
Let h represent the maximum height of the ball after t seconds.
Given that:
h(t) = -16t² + 20t + 2
The maximum height is at h'(t) = 0; hence:
h'(t) = -32t + 20
-32t + 20 = 0
32t = 20
t = 0.625
h(0.625) = -16(0.625)² + 20(0.625) + 2 = 8.25 feet
The maximum height is 8.25 feet
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A savings account earns 8% interest each year, compounded quarterly (4 times a year). If a person invests $100 and makes no further deposits or withdrawals, what is the balance in the account after 3 years?
Answers
Answer:
251.817012
Step-by-step explanation:
1. Write out equation to get 100(1.08)^n*4
2. Use 3 for n
3. Simplify to get 100(1.08)^12
4. Solve to get 251.817012
Five thousand tickets are sold at $1 each for a charity raffle. Tickets are to be drawn at random and monetary prizes awarded as follows: 1 prize of $600,3 prizes of $300,5 prizes of $40, and 20 prizes of $5. What is the expected value of this raffle if you buy 1 ticket? Let X be the random variable for the amount won on a single raffle ticket E(X)= dollars (Round to the nearest cent as needed)
Answers
The expected value of buying one ticket in this charity raffle is $0.42. This means that, on average, a person can expect to win approximately $0.42 if they purchase a single ticket.
To calculate the expected value, we need to consider the probability of winning each prize multiplied by the value of the prize. Let's break it down:
- There is a 1/5000 chance of winning the $600 prize, so the expected value contribution from this prize is (1/5000) * $600 = $0.12.
- There are 3/5000 chances of winning the $300 prize, so the expected value contribution from these prizes is (3/5000) * $300 = $0.18.
- There are 5/5000 chances of winning the $40 prize, so the expected value contribution from these prizes is (5/5000) * $40 = $0.04.
- Finally, there are 20/5000 chances of winning the $5 prize, so the expected value contribution from these prizes is (20/5000) * $5 = $0.08.
Summing up all the expected value contributions, we get $0.12 + $0.18 + $0.04 + $0.08 = $0.42.
Therefore, if you buy one ticket in this raffle, the expected value of your winnings is $0.42.
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What expression should be used to access the first element of an array of integers called numbers? What expression should be used to access the last element of numbers, assuming it contains 10 elements? What expression can be used to access its last element, regardless of its length?
Answers
To access the first element of an array of integers called "numbers," you can use the expression:
numbers[0]`
This expression uses the array name "numbers" and the index "0" to access the first element.
To access the last element of "numbers," assuming it contains 10 elements, use the expression:
`numbers[9]`
Here, we use the index "9" since arrays are zero-indexed, meaning the last element in a 10-element array has an index of 9.
To access the first element of the array called numbers, we would use the expression "numbers[0]."
To access the last element of the array, assuming it contains 10 elements, we would use the expression "numbers [9]" since arrays are zero-indexed in most programming languages.
To access the last element of the array regardless of its length, we can use the expression "numbers [numbers.length-1]," which subtracts 1 from the length of the array to access the last element.
To access the last element, regardless of its length, use the expression:
'numbers [numbers. length - 1]'
This expression uses the "length" property of the array to find the total number of elements and subtracts 1 to get the correct index for the last element.
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A baker uses a coffee mug with a diameter of 8\text{ cm}8 cm8, start text, space, c, m, end text to cut out circular cookies from a big sheet of cookie dough.
What is the area AAA of each cookie?
Give your answer in terms of pi.
A=A=A, equals
\text{cm}^2cm
2
start text, c, m, end text, squared
Answers
Answer:
Step-by-step explanation:
Since the cookies is circular in nature, we will use the formula for calculating the area of circle to calculate the area if each cookies.
Area of each cookies = πd²/4
Given diameter d = 8cm
Area of the cookies = π(8)²/4
Area of the cookies = 64π/4
Area of the cookies = 16π cm²
Answer:
16 pi ^2
Step-by-step explanation:
um yes
BRAINLIEST!
find x and y
7x + y =-16 and -7x + y = -16
Answers
Answer:
x = 0, y= -16
Step-by-step explanation:
Okay, we can use elimination to do this. Add the two equations together to get rid of one of the variables. 7x and -7x cancel each other out, so we are left with y+y= -32. If y+y is -32, then y= -16. Let's plug that back one of the equations. I'll choose the first equation. 7x +(-16) = -16. We can simplify that to 7x - 16= -16. Okay, we add 16 to both sides which gets us 7x=0. From this, we can infer that x=0 because 0x7=0. Now we have the answer, x=0, and y= -16. I hope this helps!
Using the following model and corresponding parameter estimates, predict the (approximate) value of y variable when
x=1 : y=β+βlnx+u
The parameter estimates are β1=2 and β2=1 [Parametes estimates are given in bold font]
a. 1
b. 2
c. 3
d. 4
Answers
Approximate value of y when x=1 is 2 (based on the given model and parameter estimates). Therefore, the answer is option b.
To predict the value of the y variable when x=1 using the given model and parameter estimates, we substitute the values into the equation:
y = β + β ln(x) + u
Given parameter estimates:
β1 = 2
β2 = 1
Substituting x=1 into the equation:
y = 2 + 2 ln(1) + u
Since ln(1) is equal to 0, the equation simplifies to:
y = 2 + 0 + u
y = 2 + u
As we don't have information about the value of the error term u, we can't provide an exact value for y when x=1. However, we can say that the approximate value of y when x=1 is 2, based on the given model and parameter estimates. Therefore, the answer is option b.
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If one standard drink of white wine is 107mL how many standard drinks are equivalent to a 150mL restaurant serve of white wine?
Answers
Answer: A 150mL restaurant serve of white wine is equivalent to 1.4 standard drinks.
Step-by-step explanation:
To determine how many standard drinks are equivalent to a 150mL restaurant serve of white wine, we need to divide the volume of the 150mL serve by the volume of one standard drink, which is 107mL.So, the calculation is: 150 mL ÷ 107 mL/drink = 1.4 standard drinks. Therefore, a 150mL restaurant serve of white wine is equivalent to 1.4 standard drinks.
5. The point (-7, 4) is reflected over the line x = -3. Then,
the resulting point is reflected over the line y = x. Where
is the point located after both reflections?
A. (-10,-7)
B. (1,4)
C. (4, -7)
D. (4,1)
Answers
Answer:
(4,1)
Step-by-step explanation:
Reflected over x = -3, new point : (1,4)
Reflected over y=x, new point = (4,1)
Several friends (Calvin, Dean, Kelli, and Lee) went to Cal's Late Night Diner for a bite to eat. Match each person to their drink (Iced tea, Lemonade, Root Beer, and Water) and determine how much each paid ($4.99, $5.99, $6.99, and $7.99) for their meal.
Clues:
1. The Diner who paid $4.99 was either Calvin or the one who got the Root Beer.
2. Kelli paid $6.99
3. The one who got the water paid 1 dollar less than Dean.
4. Calvin paid more than Lee.
5. The one who got the Root beer paid 1 dollar less than the one who got the Iced Tea.
Answers
Based on the given clues, we can determine the person, drink, and price paid for each individual:
Calvin: Root Beer, $4.99
Dean: Lemonade, $7.99
Kelli: Water, $6.99
Lee: Iced Tea, $5.99
How to determine how much each friends paidFrom clue 1, we know that either Calvin or the person who got the Root Beer paid $4.99. Since Calvin paid more than Lee according to clue 4, Calvin cannot be the one who got the Root Beer. Therefore, Calvin paid $4.99.
From clue 2, Kelli paid $6.99.
From clue 3, the person who got the water paid $1 less than Dean. Since Dean paid the highest price, the person who got the water paid $1 less, which means Lee paid $5.99.
From clue 5, the person who got the Root Beer paid $1 less than the person who got the Iced Tea. Since Calvin got the Root Beer, Lee must have gotten the Iced Tea.
Therefore, the final assignments are:
Calvin: Root Beer, $4.99
Dean: Lemonade, $7.99
Kelli: Water, $6.99
Lee: Iced Tea, $5.99
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Find the measures of <1 and <2.
Answers
Answer:
angle 1=120
angle 2 =75
Step-by-step explanation:
when there is a quadrilateral shape in a circle and it four point are all touches with the circle,
the both side add together are 180°
example :60+angle 1 =180
105+angle 2 = 180
so
angle 1
180-60=120
angle 2
180-105=75
PLS HELP ASAP 4 BRAINLIEST
Answers
Answer:
The answer is A
Step-by-step explanation:
105+90=5x-70
195+70=5x-70+70
\( \frac{265}{5} = \frac{5x}{5} \)
53=x and then when you insert to in the formula 5(53)-70 you get 195
and 105+90 is also equal to 195
Youre welcome!
3. Which table has a constant of proportionality equal to 2.5?
x
х
y
X
0
0
2.5
os
2.5
NO
1
2
.
5
7.5
А
о
B
х
y
2
у
2.5
3.75
W NX
2
5
3
3
7.5
10
4
ch
5
4
D
Answers
Answer:
your answer is A
I can assure you that you will give brainlest
Answer:
A
Step-by-step explanation:
I can’t figure out the answer to this problem, someone please help!
The perpendicular from the vertex of the right angle of a right triangle divides the hypotenuse into parts of 23.04 and 1.96 m. Find the length of the perpendicular and the length of the two sides of the triangle. (Draw the figure for this problem. Then, compare it to the answer after you’ve completed the problem.)
Answers
Answer:
Therefore, the length of the perpendicular CD is 8.4 m, and the lengths of the two sides of the triangle are AC = BC = 22.8 m.
Step-by-step explanation:
Let ABC be the right triangle with right angle at C, and let CD be the perpendicular from C to AB, as shown in the attached image.
We are given that CD divides AB into two parts of 23.04 m and 1.96 m. Let x be the length of CD. Then, by the Pythagorean Theorem:
AC^2 + x^2 = 23.04^2 (1)
BC^2 + x^2 = 1.96^2 (2)
Since AC = BC (since the triangle is a right triangle with equal legs), we can subtract equation (2) from equation (1) to get:
AC^2 - BC^2 = 23.04^2 - 1.96^2
Since AC = BC, we have:
2AC^2 = 23.04^2 - 1.96^2
Solving for AC, we get:
AC = BC = sqrt((23.04^2 - 1.96^2)/2) = 22.8 m
Now, we can use equation (1) to solve for x:
AC^2 + x^2 = 23.04^2
x^2 = 23.04^2 - AC^2 = 23.04^2 - 22.8^2
x = sqrt(23.04^2 - 22.8^2) = 8.4 m
Therefore, the length of the perpendicular CD is 8.4 m, and the lengths of the two sides of the triangle are AC = BC = 22.8 m.
The line parallel to y = -x that passes through (5, 2.5)
Answers
Answer: hi
Step-by-step explanation:
What resistance would produce 125 amps from a 6.0 volt battery
Answers
Answer:
0. 048
Step-by-step explanation:
Given that V=IR
R=V/I
R=6.0/125
R=0. 048ohms
Please help me!!!!!!!!
Answers
We can see here that the solutions to the triangles are:
1. 62.2°.
2. 35.9°
3. 61.9°
4. 53.1°
How we arrived at the solutions?We can see here that using trigonometric ratio formula, we find the values of x.
We see the following:
1. Cos x = 7/15 = 0.4666
x = \(cos^{-1}\) 0.4666 = 62.2°.
2. Sin x = 27/46 = 0.5869
x° = \(sin^{-1}\) 0.5869 = 35.9°
3. Sin x = 30/34 = 0.8823
x° = \(sin^{-1}\) 0.8823 = 61.9°
4. Tan x = 8/6 = 1.3333
x° = 1.3333 = 53.1°
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Write without negative exponents: (3xy^−3)^−2
Answers
The expression \((3xy^{-3})^{-2}\) without negative exponents is \(\frac{y^6}{9x^2}\).
What are some rules of exponents?Some common rules of exponents are
xᵃ×xᵇ = xᵃ⁺ᵇ.
xᵃ/xᵇ = xᵃ⁻ᵇ.
Addition and subtraction of exponents are only possible for the same base value and when the base is different and both have the same exponent we just multiply the bases and write the exponent.
Given, An expression in exponents \((3xy^{-3})^{-2}\).
Now, Changing the place of exponents from the numerator to the denominator or vice versa changes its sign.
Therefore, \((3xy^{-3})^{-2} = 3^{-2}x^{-2}y^{6}\).
\(3^{-2}x^{-2}y^{6} = \frac{y^6}{3^2x^2}\).
\(\frac{y^6}{3^2x^2} = \frac{y^6}{9x^2}\).
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give an example of a solid from which a triangular, hexagonal, and trapezoidal cross-section can be formed.
Answers
Triangular prism is an example of a solid from which a triangular, hexagonal, and trapezoidal cross-section can be formed.
What is a triangular prism?A triangular prism is a polyhedron that is made up of triangular bases and three rectangular sides. It is a three-dimensional shape that has three side faces and two base faces, connected to each other through the edges to the vertex.
Some properties of a triangular prism:
It has five faces in total - looks a trapezoidHas nine edgesHas six vertices; hexagonaltwo triangular bases that are equalThus, triangular prism is an example of a solid from which a triangular, hexagonal, and trapezoidal cross-section can be formed.
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The length of the hypotenuse of a right triangle is 10 cm. One of the acute angles is decreasing at the rate of 5°/sec. How fast is the area decreasing when this angle is 30°? -25π/36 cm/sec
Answers
The area is decreasing at a rate of (-25π/36) cm²/sec, when the angle is 30° and decreasing at a rate of 5°/sec.
How to calculate the rate of change of variable?Let's denote the hypotenuse of the right triangle by c, and the acute angle by θ. Let's also denote the legs of the triangle by a and b.
Since we know that the hypotenuse is 10 cm,
we can use the trigonometric identity sin(θ) = a/c to find the value of the legs:
sin(θ) = a/ca = c * sin(θ)a = 10 * sin(θ)Similarly, we can use the identity cos(θ) = b/c to find the value of b:
cos(θ) = b/cb = c * cos(θ)b = 10 * cos(θ)The area of the triangle is given by the formula A = (1/2)ab, so we can express the area in terms of θ:
A = (1/2)abA = (1/2)(10 sin(θ))(10 cos(θ))A = 50 sin(θ) cos(θ)A = 25 sin(2θ)To find how fast the area is decreasing when θ = 30°, we can take the derivative of the area with respect to time t, and use the chain rule:
dA/dt = d/dt [25 sin(2θ)] * dθ/dt
We know that dθ/dt = -5°/sec, since the angle is decreasing at a rate of 5°/sec. When θ = 30°, we have:
dA/dt = d/dt [25 sin(2θ)] * dθ/dtdA/dt = 25 cos(2θ)dA/dt = 25 cos(60°)(-5°/sec)dA/dt =(-25π/36) cm²/secTherefore, the area is decreasing at a rate of (-25π/36) cm²/sec when the angle is 30° and decreasing at a rate of 5°/sec.
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