During each week of piano lessons, Justin learns to play 2 new pieces. In all, how many weeks of piano lessons will Justin need before he will be able to play a total of 46 pieces?

Answer:

.4

Step-by-step explanation:

Camile shaded 18/30 of a model.

Thus the unshaded portion of the model is:

30 - 18 = 12

12/30

12/30 = 0.4

The slope is 5/3 and the h intercept is (0,8/3)

Answer:

Reflection across the x-axis

Step-by-step explanation:

The points are the same, just opposite of one another. The image looks as if it is a reflection. Think of the x-axis like a puddle and the shape looking into it; try to picture the image seeing its reflection to help.

Answer:

Reflection across the x-axis.

Step-by-step explanation:

The triangles mirror each other with the x-axis acting like said mirror.

Answer:

Step-by-step explanation:

8x + 38 = -3(-6 - 4x)

8x + 38 = -3(-4x - 6)

8x + 38 = -3 (-4x - 6)

8x + 38 = 12x + 18

8x +38 = 12x + 18

8x + 38 - 38 = 12x + 18 - 38

8x + 38 - 38 = 12x + 18 - 38

8x = 12x + 18 - 38

8x= 12x - 20

8x = 12x - 20

8x - 12x = 12x - 20 - 12x

8x - 12x = 12x - 20 - 12x

-4x = 12x - 20 -12x

-4x = 12x - 20 -12x

-4x = - 20

-4x = -20

[tex]\frac{-4x}{-4} =\frac{-20}{-4}[/tex]

X = 5

Answer:

A = 65deg

B = 78deg

Step-by-step explanation:

It's a triangle, so we know that the sum of angles is 180deg

x + (2x - 9) + (2x + 4) = 180

5x - 5 = 180

5x = 185

x = 37

Measure of angle A = (2*37 - 9)deg = 65deg

Measure of angle B = (2*37 + 4)deg = 78deg

Answer:

x = 3/2

Step-by-step explanation:

7/3 = (x + 2)/x

7x = 3(x + 2)

7x = 3x + 6

4x = 6

x = 6/4 = 3/2

There, someone helped you.  Now could you do it alone next time?

Answer:

D) is the correct answer

Step-by-step explanation:

To define a function, so one x can only corresponding to one y.

Then for A) we have x = -5, but y can be 1 and 4, so it is to a function,

for B) x =1, y = -1 or -4, so not. For C) x =0, y = -3 or 0, so wrong. Then left with D) which each x only corresponding to one y, so D) is correct.

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Greetings, I am BrotherEye

Answer:

If two pairs of corresponding angles in a pair of triangles are congruent, then the triangles are similar. We know this because if two angle pairs are the same, then the third pair must also be equal. When the three angle pairs are all equal, the three pairs of sides must also be in proportion.

Step-by-step explanation:

Best Of Luck

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BrotherEye

Answer: 108.83 yd²

Step-by-step explanation:

First find height.

Use trigonometric ratios:

sin85 = h/9.5

h = 9.5sin85 = 9.46 yd

Use the following formula:

A = [tex]\frac{1}{2}[/tex]bh

A = [tex]\frac{1}{2}[/tex] (23)(9.46)

A = 108.83 yd²

The area of the trapezoid formula can be solved for the variable h as,

h = 2A / (b1 + b2)

Given the formula to find the area of the trapezoid.

A = 1/2 (b1 + b2) h

Here A is the area, h is the height and b1 and b2 are the bases of the trapezoid.

We have to get an equation for formula in h.

That is, we need to isolate h alone on one side and the other terms and variables on other side.

Multiplying whole equation with 2,

2A = (b1 + b2) h

Dividing whole by (b1 + b2),

h = 2A / (b1 + b2)

Hence the required equation is h = 2A / (b1 + b2).

To learn more about Formula here :

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Answer:

Step-by-step explanation:

it means that her friend ate 37 cookies from the 561 cookies that kayla had before she ate them

Answer:

it means That Kayla is about to catch a body

Step-by-step explanation:

Answer:

12

Step-by-step explanation:

(1×3)+(1×3)+(1×3)+(1×3)

3+3+3+3

12 apples

Answer:

4√15

Step-by-step explanation:

The geometric mean of x and y is √(xy).

So here we have:

√(12*20)

= √240

= √(16*15)

= √16√15

= 4√15.

Answer:

You graph each equation, then you find the intercepting point. the location of that point is the answer. You can also do it in equation form.

we have y≥2x-2 ------> inequality A

The inequality A is the solid red line in the graph the solution of the inequality A is the shaded area above the solid red line x+4y≥?------> inequality B The inequality B is the solid blue line in the graph the solution of the inequality B is the shaded area above the solid blue line we know that the point (0,-3) lie on the line of the inequality B. substitute the values of x and y in the equation of the line

x+4y=c

0+4*(-3)=c

c=-12

so the answer is -12

The system of linear inequalities is:

y > 2x – 2 and x + 4y > -12.

It shows a relationship between two numbers or two expressions.

There are commonly used four inequalities:

Less than = <

Greater than = >

Less than and equal = ≤

Greater than and equal = ≥  

We have,

When x = 0, y = 2(0) – 2 = -2.

So the point (0, -2) is on the line.

When x = 2, y = 2(2) – 2 = 2.

So point (2, 2) is on the line.

Plotting these two points and drawing a line through them gives us the graph of y = 2x – 2.

Next, let's graph x + 4y = -12 by solving for y:

x + 4y = -12

4y = -x - 12

y = (-1/4)x - 3

Again, we can plot two points on the line.

When x = 0, y = -3, giving us the point (0, -3).

When x = -4, y = -2, giving us the point (-4, -2).

Plotting these points and drawing a line through them gives us the graph of x + 4y = -12.

Thus,

The solution to the system of inequalities is the shaded region where the two graphs intersect and y > 2x – 2.

This region is shown in the attached image.

Learn more about inequalities here:

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Answer:

a+ 96

Step-by-step explanation:

A= (1/2*18 + 1/2*6) *8

A= (9 + 3) * 8

A= 12 * 8

A= 96

Answer:

27

Step-by-step explanation:

3^2=9

2^3=8

9×8=72

9×4=36

72+36=108

108÷2^2

2^2=4

108÷4=27

hoped this helped you!

Answer: The mode is greater than 7.

Step-by-step explanation:

The time in minutes are given as 9, 15, 5, 7, 9, 12, 11, 4. We can arrange them in ascending order and this will be:

= 4, 5, 7, 9, 9, 11, 12, 15

Mean = (4 + 5 + 7 + 9 + 9 + 11 + 12 + 15) / 8 = 9

Median = 9+9/2 = 18/2 = 9

Mode = 9

Range = 15 - 4 = 11

Therefore, the true statement are:

D. The mode is greater than 7.

Explanation is in the file

tinyurl.com/wtjfavyw

Answer:

Step-by-step explanation:

5(6-3)=6+13 -simplify

30-15=6+13

15=19

x doesnt equal 6

5(x-3)=x+13

5x-15=x+13

4x=28

x=7

4x=28

4(7)=28

28=28

Answer:

1) A

3) A

Step-by-step explanation:

Solve using factoring or quadratic formula.

Answer:

[tex]2x + 20 = 60 \\ 2x = 60 - 20 \\ 2x = 40 \\ x = \frac{40}{2} \\ x = 20[/tex]