Answer:
( -2,-3) is the midpoint
Step-by-step explanation:
To find the x coordinates of the midpoint, add the x coordinates of the endpoints and divide by 2
( -1+-3)/2 = -4/2 =-2
To find the y coordinates of the midpoint, add the y coordinates of the endpoints and divide by 2
( 3+-9)/2 = -6/2 =-3
( -2,-3) is the midpoint
Graph the system of inequalities. Then use your graph to identify the point that
represents a solution to the system.
x + y2 3
x-3y< 2
(6, 1)
(8,-1)
(6,2)
O (6,-2)
The coordinates in the solution to the systems of inequalities graphically is (6, 2)
Solving the systems of inequalities graphicallyFrom the question, we have the following parameters that can be used in our computation:
x + y > 3
x - 3y < 2
Next, we plot the graph of the system of the inequalities
See attachment for the graph
From the graph, we have solution to the system to be the shaded region
The coordinates in the solution to the systems of inequalities graphically is (6, 2)
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8) HELP PLEASE ILL GIVE BRAINLIEST!! Find the median of the set of data.(Remember to put the
list in numerical order)
10, 15, 8, 1, 3, 10, 6, 3
a. 7
b. 10
c. 4.5
d. 9
Crackers contain 12 calories each and cookies contain 52 colonies each. If you eat 5 crackers and 2 cookies, how much calories have you consumed in all?
Answer:
crackers= 60 calories
cooies= 104
total= 164 calories
Step-by-step explanation:
Simplify the fraction
18
60
as much as possible.
3
10
18
60
12
54
Answer:
3/10
Hope this helps!
Have a good day :)
HELP PLS ILL GIVE BRAINLIEST IF ITS A FAKE ANSWER ILL REPORT
Answer:
Step-by-step explanation:
yes
yes
no
no
How do I get to the answer of this question?
Answer:
(A) 45 degrees
Explanation:
Given that triangle BCD is an Isosceles Triangle where BD=CD.
• Then the base angles of Isosceles triangle BCD: ,Angles B and C are congruent and are both 50 degrees.
The sum of the angles in a triangle is 180 degrees, therefore, in triangle BCD:
\(\begin{gathered} m\angle B+m\angle C+m\angle D=180\degree \\ 50\degree+50\degree+m\angle D=180\degree \\ m\angle D=180\degree-100\degree \\ m\angle D=80\degree \end{gathered}\)As can be seen in the diagram below:
Angle D (in triangle BDC) is an exterior angle of opposite interior angles A and B (in triangle BAD).
The sum of opposite interior angles is equal to the exterior angle.
\(\begin{gathered} m\angle A+m\angle B=m\angle D \\ m\angle A+35\degree=80\degree \\ \text{Subtract 35 from both sides} \\ m\angle A=80\degree-35\degree \\ m\angle A=45\degree \end{gathered}\)
The measure of angle A is 45 degrees.
Solve for the measure of x.
Answer:
Step-by-step explanation:
take 60 degree as reference angle
using sin rule
sin 60=opposite/hypotenuse
\(\sqrt{3}\)/2=x/8\(\sqrt{5}\)(do cross multiplication)
2x=\(\sqrt{3\) *8\(\sqrt{5}\)
2x=8\(\sqrt{15}\)
x=8\(\sqrt{15}\)/2
x=4\(\sqrt{15}\)
for y
using pythagoras theorem
h^2=p^2+b^2
(8\(\sqrt{5}\) )^2=(4\(\sqrt{5}\) )^2+b^2
320=80+b^2
320-80=b^2
240=b^2
\(\sqrt{240}\) =b
4\(\sqrt{15}\)=y
If cos x= sin(20 + x)° and 0° < x < 90°, the value of xis
Answer:
draw a right angle triangle
Step-by-step explanation:
Let one of the angles be A
cos A = sin (90-A)
90 - x - 20 = x
2x = 70
x = 35 degrees
For the equation f(x)=1.9(0.41)*, state the initial value C, the growth or decay factor a, and percent change R for each unit increase in x.
C=(Type an integer or a decimal.)
Initial value C is 1.9, Decay factor =0.41 and Growth factor = 0.59 when the function f(x)=1.9(0.41)ˣ.
Given that,
The equation f(x)=1.9(0.41)ˣ.
We have to state the initial value C, the growth or decay factor a, and percent change R for each unit increase in x.
We know that,
What is growth and decay?In order to translate their graphs over the 2D coordinate plane, I will offer the vertex form of an exponential equation for both the growth and decay functions.
In the case of growth, f(x) = a(1+r\()^{x-h}\)+k, where b = 1+r
Decay is defined as f(x)=a(1-r)(x-h\()^{x-h}\)+k, where b=1-r.
Consider the function f(x)=1.9(0.41)ˣ.
We write as
f(x)=1.9(1-0.59)ˣ
So, initial value C is 1.9
Decay factor =0.41
Growth factor = 0.59
Therefore, Initial value C is 1.9, Decay factor =0.41 and Growth factor = 0.59 when the function f(x)=1.9(0.41)ˣ.
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A school psychologist notes that the average number of times that students are disruptive during class is 1.4 [μ=1.4] times per day. Following recent classroom policy changes, the psychologist tests if the number of disruptions during class has changed. He records the following number of disruptions observed during a class day: 2, 4, 3, 5, 1, 1, and 4.
A. Test the hypothesis that the number of complaints has increased or decreased using a .05 level of significance.
B. Compute effect size using estimated Cohen's d.
Answer:
Reject the Null ;
0.928
Step-by-step explanation:
Given the data: 2, 4, 3, 5, 1, 1, 4
Sample mean = (2 + 4 + 3 + 5 + 1 + 1 + 4) / 7 = 2.857
Standard deviation, s = 1.57 ( using calculator)
The hypothesis :
H0 : μ = 1.4
H1 : μ ≠ 1.4
Since sample size is small, use T test
Test statistic :
Tstatistic = (x - μ) / s/sqrt(n)
Tstatistic = (2.857 - 1.4) / 1.57/sqrt(7)
Tstatistic = 1.457 / 0.593 = 2.455
Two tailed test at α = 0.05
Tcritical at df = 7-1 = 6 ; α = 0.05 = 2.447
Tstatistic > Tcritical ; reject the null
Since ;
2.455 > 2.447 ; we reject the null ;
There is significam evidence that Number of complaints has changed.
Effect size ;
d = (x - μ) / s
d = (2.857 - 1.4) / 1.57
d = 1.457 / 1.57
d = 0.928
plz help I will mark brainlest!
Answer: hmmmmm
Step-by-step explanation:
It’s a b or c and maybe just maybe b
Any know the answer to this?
f(x) =0x+5
could you help me with this problem please
1. Using the quadratic formula
\(x=(-b\pm\sqrt{b^{2}-4ac})/2a\)
\(x=(-4\pm\sqrt{16-64} )/2\)
\(x=[-4\pm(-4\sqrt{3}i)]/2\\x=-2\pm2\sqrt{3}i\)
so, its c-Hunter
Answer:
\(x = -2 \pm 2i\sqrt{3}}\)
Explanation:
given quadratic sample: x²+4x+16=0
Quadratic formula: \(x = \frac{ -b \pm \sqrt{b^2 - 4ac}}{2a}\)
Here a = 1, b = 4, c = 16 [ which are coefficients from ax²+bx+c ]
using the formula:
→ \(x = \frac{ -4 \pm \sqrt{4^2 - 4*1*16}}{2*1}\)
→ \(x = \frac{ -4 \pm \sqrt{-48}}{2}\)
→ \(x = \frac{ -4 \pm 4i\sqrt{3}}{2}\)
→ \(x = -2 \pm 2i\sqrt{3}}\)
Which graph represents the function f(x) = -|x| − 3?
A Reflection over the y-axis and a shift downwards by three units, which is consistent with the function f(x) = -|x| − 3.
The function f(x) = -|x| − 3 can be graphed by following these steps:
To begin, draw a regular x and y-axis and mark it off with an appropriate scale. Then, mark off the negative values on the y-axis and both negative and positive values on the x-axis. After that, we will begin graphing the function f(x) = -|x| − 3, which is a reflection of the absolute value of x over the y-axis and shifted three units down the y-axis. Since the function f(x) = -|x| − 3 is a reflection of the absolute value of x over the y-axis, the graph should be symmetrical. This means that each point to the left of the y-axis is a reflection of the point to the right of the y-axis. Then, we will plot the vertex (0, -3), which is three units down from the origin. Next, we can plot other points using a table of values. We can select values for x that are both negative and positive, such as -2, -1, 0, 1, and 2, and then evaluate them to find the corresponding y values. Then, plot these points on the graph. Finally, we connect the points with a smooth curve, which will form the graph of the function f(x) = -|x| − 3. The graph will be in the shape of a V that opens downwards.Therefore, the correct graph is an option (D). The graph of the option (D) shows a reflection over the y-axis and a shift downwards by three units, which is consistent with the function f(x) = -|x| − 3.
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100 Points! Geometry question. Photo attached. Please show as much work as possible. Thank you!
Answer
Measure the shape yourself and follow the explanation.
Step-by-step explanation:
Measure each side of the Triangles with your ruler. Record it.
For example,
I measured and got 3cm, 3.5cm, 3.5cm.
Multiply by scale factor r 2.
for example, 3cm × 2 = 6cm
3.5cm × 2 = 7.0cm
3.5cm × 2 = 7.0cm
Use your pencil to draw your new numbers to form the new Triangle.
As for the second shape, measure each four sides using ruler
for example, I measured and had 4cm, 6cm, 4cm, 6m.
Multiply by scale factor r 2.
for example, 4cm × 1/4 = 1 cm
6cm × 1/4 = 1.5cm
4cm × 1/4 = 1 cm
6cm × 1/4 = 1.5cm
Use your ruler to measure 1cm, 1.5cm, 1cm and 1.5cm, then to draw your new shape
someone pls help solve this
Answer:
`y = 2
y = -1
Step-by-step explanation:
Im not very good at explaining things im new at so all i can get s the answer
Find the number of years the annuity will last if it pays 300 per year.
The number of years the annuity will last if it pays $300 per year is 18 years.
What is an annuity?An annuity is an investment that pays the investor a fixed periodic amount for many years in the future.
The annuity payment may be monthly or yearly, as the case may be.
An online finance calculator can compute the annual payment (annuity).
I/Y (Interest per year) = 7%
PV (Present Value) = $3,000
PMT (Periodic Payment) = $-300
FV (Future Value) = $0
Results:
N = 17.795
Sum of all periodic payments = $-5,338.44
Total Interest $2,338.44
Thus, for an annuity with a present value of $3,000, earning 7% per annum and paying $300 per year will last almost 18 years.
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Question Completion:The present value of an annuity is $3,000 and earns 7% per annum.
Find the number of years the annuity will last if it pays $300 per year.
Suppose Carson worked as a babysitter for85 hours one week. What is the minimum number of full hours he would need to work at his fathers business to earn at least $96 that week?
Answer:
Answer: The minimum number of full hours did Carson need to work at his father's business is 8 hours and 15 minutes. Happy to help!
Step-by-step explanation:
What’s the correct answer answer asap
Answer:
The answer should be B.
Please help me for 15 points
Cones A and B both have volume 48bold pi cubic units, but have different dimensions. Cone A has radius 6 units and height 4 units. Find one possible radius and height for Cone B. Explain how you know Cone B has the same volume as Cone A.
Cone B does not have volume 48bold pi cubic units with these dimensions, but it does have the same volume as Cone A because they both have volume 48bold pi cubic units.
what is a cone?A cone, also known as a vertex, is a three-dimensional polygonal object with a flat base and a soft tapering apex. In a plane with no vertices, a cone is formed by connecting a story arc of lines, half-lines, but rather routes those are common to all focuses on the outpost. A cone is a muti structure with just a peaceful transition from a flat, round or, base towards the vertex and apex, which represents as the base's axis. A three-dimensional polygonal shape with only an upwardly flat curved surface is known as a cone.
Because Cone A has a volume of 48bold pi cubic units, we can use the volume of a cone formula to calculate its height:
Cone volume = 1/3 * base area * height
1/3 * pi * 62 * 4 = 48bold pi
48pi = 48bold pi
As a result, Cone A's height is 4 units. The radius is also 6 units, as we can see.
Cone volume = 1/3 * base area * height
\(1/3 * pi * r2 * h = 48\\144 = r^2 * h\\144 = 8^2 * 3\\144 = 192\)
Cone B does not have volume 48bold pi cubic units with these dimensions, but it does have the same volume as Cone A because they both have volume 48bold pi cubic units.
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Points A (4, 3), B (6, 4), C (5, 6) and D (3, 5) are the vertices of a square ABCD. The square ABCD is reflected about the line through (0, 0) and (-2, 2). Find the vertices of the image of the square ABCD and present both the figures on the same graph.
The vertices of the reflected square.
Let's calculate them:
A' = (-0.914, 3.914)
B' = (-2.828, 5.828)
C' = (-0.086, 7.086)
D' = (1.828, 5.172)
The vertices of the image of the square ABCD after reflecting it about the line through (0, 0) and (-2, 2), we can use the following steps:
Find the equation of the reflection line:
The reflection line passes through (0, 0) and (-2, 2).
We can calculate the slope (m) of the line using the formula (y2 - y1) / (x2 - x1):
m = (2 - 0) / (-2 - 0) = 2 / -2 = -1.
Using the point-slope form of a line (y - y1) = m(x - x1), we can use either of the given points to write the equation of the line:
y - 0 = -1(x - 0)
y = -x.
Find the midpoint of each side of the square:
The midpoints of the sides of a square are also the midpoints of its diagonals.
The midpoint of AB is ((4+6)/2, (3+4)/2) = (5, 3.5).
The midpoint of BC is ((6+5)/2, (4+6)/2) = (5.5, 5).
The midpoint of CD is ((5+3)/2, (6+5)/2) = (4, 5.5).
The midpoint of DA is ((3+4)/2, (5+3)/2) = (3.5, 4).
Reflect the midpoints about the line:
To reflect a point (x, y) about the line y = -x, we can find the perpendicular distance (d) from the point to the line and use it to determine the reflected point.
The perpendicular distance d from the line y = -x to a point (x, y) is given by the formula:
d = (y + x) / √(2).
The coordinates of the reflected points can be found using the formula for reflection across a line:
x' = x - 2d / √(2)
y' = y - 2d / √(2).
Calculate the reflected vertices:
The coordinates of the reflected vertices are as follows:
A' = (4 - 2(3.5 + 5) / √(2), 3 - 2(3.5 - 5) / √(2))
B' = (6 - 2(5 + 5) / √(2), 4 - 2(5 - 5) / √(2))
C' = (5 - 2(5.5 + 5) / √(2), 6 - 2(5.5 - 5) / √(2))
D' = (3 - 2(4 + 5) / √(2), 5 - 2(4 - 5) / √(2))
Now we can plot the original square ABCD and its image A'B'C'D' on the same graph to visualize the reflection.
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factor the trinomial : 6x2 + x - 2 =
Answer:
(3x+2)(2x-1)
Step-by-step explanation:
6x²+x-2
6x²+4x-3x-2
2x(3x+2)-1(3x+2)
(3x+2)(2x-1)
Solve for r 1+3r>10 please I need this solved aspap
The solution to the inequality 1 + 3r > 10 is r > 3.
This means that any value of r greater than 3 will satisfy the inequality.
To solve the inequality 1 + 3r > 10, we need to isolate the variable r on one side of the inequality sign.
Let's begin by subtracting 1 from both sides of the inequality:
1 + 3r - 1 > 10 - 1
This simplifies to:
3r > 9
Next, we can divide both sides of the inequality by 3 to solve for r:
(3r)/3 > 9/3
This simplifies to:
r > 3
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A company estimates that 0.8% of their products will fail after the original warranty period but within 2 years of the purchase, with a replacement cost of $300.
If they offer a 2-year extended warranty for $47, what is the company's expected value of each warranty sold? Round your answer to the nearest cent.
Answer: The expected value of each warranty sold can be calculated as the sum of the product of the probability of a product failing after the original warranty period and the replacement cost, and the cost of the extended warranty:
Expected value = (0.8% of $300) + ($47)
Expected value = (0.008)($300) + ($47)
Expected value = $2.40 + $47
Expected value = $49.40
Therefore, the company's expected value of each warranty sold is $49.40.
Step-by-step explanation:
From the table below, determine whether the data shows an exponential function. Explain why or why not. x 3 2 1 –1 y 8 2 0.5 0.125 a. No; the domain values are at regular intervals and the range values have a common factor 0.25. b. No; the domain values are not at regular intervals although the range values have a common factor. c. Yes; the domain values are at regular intervals and the range values have a common factor 4. d. Yes; the domain values are at regular intervals and the range values have a common factor 0.25.
Answer:
D
Step-by-step explanation:
No the function is not an exponential function as the domain values are not at regular intervals although the range values have a common factor.
What is exponential function?The exponential function is a function which is formed by the unit e which is equal to 2.718.
How to identify function?The differences between x-values are -1, -1, -1, -2 . . . . not a constant difference
The ratios of y-values are 2/8 = 0.5/2 = 0.125/0.5 = 0.25 . . . . a constant difference
The domain values do not have a common difference shows the common factor of the range values which are of no use. So, the function is not exponential.
Hence the table does not show exponential function in any way because the domain values are at regular intervals and the range values have a common factor 0.25.
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If the ratio of 5a to 2b is 1/10 what is the ratio of a to b?
Answer:
25 to 1
Step-by-step explanation:
5a/2b = 1/10
cross-multiply:
50a = 2b
simplify to get 25 : 1
lee is traveling by train. he has 270 miles left to travel.after 2 hours,he has 180 miles remaining.the train travels at a constant rate for the entire trip.what is the speed of the train and the distance of the trip?
Derrick and Janis are planting
150 strawberry plants.
The first day, Derrick plants 20% of
the strawberry plants. Janis plants
60% of the strawberry plants.
Eliezer
How many strawberry plants do Derrick and Janis plant on the first day?
Choose one option from each drop-down menu to answer the question.
On the first day, Derrick plants Choose... strawberry plants.
Janis plants Choose... strawberry plants.
Together, they plant a total of Choose... strawberry plants.
X
Derrick and Janis together plant a total of 30 + 90 = 120 strawberry plants on the first day.
To find out how many strawberry plants Derrick and Janis planted on the first day, we need to calculate the sum of the plants they individually planted.
Derrick planted 20% of the 150 strawberry plants:
20% of 150 = (20/100) * 150 = 30 strawberry plants.
Janis planted 60% of the 150 strawberry plants:
60% of 150 = (60/100) * 150 = 90 strawberry plants.
Therefore, on the first day, Derrick and Janis planted a total of 30 + 90 = 120 strawberry plants.
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What is the length of r, round to the tenth if necessary.
Answer:
Step-by-step explanation:
This depends on whether or not you know the radius ( r) or the diameter ( d) Let’s calculate one manually, for example. If r = 6 cm, the the circumference is c = 2 π (6) = 12 π cm, if writing in terms of π. If you prefer a numerical value,