Answer:

Step-by-step explanation:
<u>The Volume of a Sphere
</u>
The volume of a sphere of radius r is given by:

A. )
If the diameter of the sphere is d, the radius is r=d/2. Substituting:

Operating

Simplifying

B.)
The diameter of the sphere is 2/3 cm, thus the volume is:

Operating:



Is think your answer is x=y+5
Step-by-step explanation:
X= 7
This is because of you plug in 7 for x into the equation it will give you 28-10 which is 18.
I just had the question and the correct answer is 36.
Answer:
(2,3)
Step-by-step explanation:
use the equal values method.
set y equal to itself.
y = -2x+7 but also 5x-7
-2x+7=5x-7 ............................. solve the equation
7x=14
x=2
Now substitute the x value into one of the equations given. for example i'll do -2x+7.
-2(2) +7 =y
-4+7=y
3=y
so thats your answer
x=2, y=3
(2,3)