Which of the following lines represents the equation y = x

Answer:

D

Step-by-step explanation:

You should have given a picture of the pyramid, however, if you cut it on a plane parallel to the base, it should create a trapezoid, which is a quadrilateral  

Answer:

65^2

Step-by-step explanation:

if you woulndt mind giving me brainliest im trying to rank up, only if u dont mind.

#1:

Between 8 cm and 9 cm

Work:

SA = 6s^2  

390 = 6 s^2

390/6 = 6s^2 /6

65 = s^2

sqrt(65) = s

s = 8.06

#2:

The total surface area of the triangular pyramid is 107 * square feet.

What is a triangular pyramid?

Take a triangle. This is a base. Now take 3 triangles such that each of them are connected to one-one side of the first triangle and when they're taken together, they form a closed object, called as a triangular pyramid.

We are given that;

The length of median from outer triangle to side of the inner triangle is 8 ft

Side of inner equilateral triangle is 12 ft

Now,

First, we can find the height of the outer equilateral triangle using the Pythagorean theorem:

a is half the length of the side of the inner triangle (6 ft), m is the length of the median (8 ft), and b is the length of the side of the outer triangle (unknown).

a^2 + (m/2)^2 = b^2

b^2 = 6^2 + 8^2/4

b^2 = 36 + 4

b^2 = 40

b = sqrt(40)

b = 2 * sqrt(10)

So the height of the outer triangle is:

h = b * sqrt(3)/2

h = sqrt(30)

Now we can find the area of each equilateral triangle using the formula:

A = (sqrt(3)/4) * s^2

For the inner triangle:

A_inner = (sqrt(3)/4) * 12^2

A_inner = 36 * sqrt(3)

For the outer triangle:

Now we can find the area of the base, which is just the area of the inner equilateral triangle:

A_base = A_inner

A_base = 36 *

Finally, we can find the surface area of the triangular pyramid by adding the areas of the four triangles and the base:

SA = A_inner + 3 * A_outer + A_base

Answer:

Angle supplementary to angle with measure of 120 is 60.

(120+x=180)

Triangle: 60+32+h = 180

h=88

Let me know if this helps!

Tip Total: $ 25.88

Total (Bill + Tip): $ 198.38

Answer:

No Because the points will not be proportional

Step-by-step explanation:

Answer:

ABCDA

Step-by-step explanation:

Answer:

67.4%

Step-by-step explanation:

246/365*100

Answer:

2?

Step-by-step explanation:

Answer:

8k^2+3

Step-by-step explanation:

hope this helps

Answer:

[tex]k^4+10k^2+21[/tex]

Step-by-step explanation:

[tex]k^2 (k^2)[/tex] is the same as saying [tex](k)(k)(k)(k)[/tex] and so it'll be [tex]k^4[/tex]. Combine [tex]7k^{2}[/tex] and [tex]3k^{2}[/tex] by adding them both to get [tex]10k^{2}[/tex]. Then multiply 7 by 3 to get 21. Therefore the area of the entire rectangle written in standard form as a polynomial is [tex]k^4+10k^2+21[/tex]. Write the polynomial with the highest degree being first to the lowest degree and that's how you write the polynomial properly.

Answer:

First, write the expression

✔ 30/t – 10

.

Second,

✔ substitute

2 in for the variable, t.

Third,

✔ simplify

by using

✔ order of operations

.

The answer is

✔ 5

.

Step-by-step explanation:

hope this helps have a nice day

Answer:

9/3

Step-by-step explanation:

It's going up by 9 and going right by 3.

Remember it's rise over run.

Answer:

f(x)=3x-3

Step-by-step explanation:

Slope=y/x

3/1=3x

Y intercept is -3

Put the slope and y intercept together and you get 3x-3

Answer:

Wholesale: $37.50

Discount: $7.50

Explanation:

*The wholesale cost of all the bikes they sell is 30%

*Andre wants to buy a bike for $125

*If the bike is discounted by 20%

[tex]\frac{30}{100}[/tex] = [tex]\frac{x}{125}[/tex] (solve for x)

100x = 125 x 30

100x = 3750

(x =  $37.50 for the wholesale)

For the discount, we need to find 20% of 37.5

An easier way we can do is to find 10% and to multiply by 2. So, move the decimal to the left of 37.5 and we get 3.75 and multiply by 2

3.75 x 2 = 7.5 ($7.50 the discount)

*

Answer:

$37.50

$7.50

Step-by-step explanation:

Answer: The answer is b.

Step-by-step explanation:

Answer:

6 miles

Step-by-step explanation:

if u dont mind givin me brainliest im just trying to rank up

Answer:

B) n - 21 = 7

Step-by-step explanation:

Matt started with [tex]n[/tex] lollipops, and gave 21 away and was left with 7.

This gives us the equation [tex]n - 21 = 7[/tex].

Answer:

A

Step-by-step explanation:

A. The average height is greater since it has a higher mean, it also vareis less

Why the others wouldn't make sense?

Answer:

D. 4

Step-by-step explanation:

A straight line equals 180 degrees if there's already 140 degrees then you need 40 more to make the line true so 10 times 4 is 40 to make 140 + 40 = 180 true

Answer:

Were you listening in class

Step-by-step explanation:

Use the formula:

1/2 * Base * Height

1/2 * 24 (the base) * 7 (height)

Do the rest.

Answer:

84

Step-by-step explanation:

formula for finding area of a triangle is

1/2 x base area x height

1/2 x 24in x 7in

1/2 x 168

= 84 ( where 2 cancels 164)

Answer:

Step-by-step explanation:

Answer:

but the inequality is (4,-8)

Step-by-step explanation:

I don't think this is middle school math LOL

this is like 3rd grade math im pretty sure

Answer:

D. 15

Step-by-step explanation:

Answer:

120

Step-by-step explanation: