(x + 5) * (x − 5) =
x² - 25
----------------
x * x = x² and 5 * (-5) = -25
(5 x 6) + 7 = 37
(5 + 7) x 6 = 72
(6 - 7) / 5 = -1/5
Well if all angles are suppose to add up to 360 degrees you can the angles to see if the equal up to 360 degrees, 264+96=360.
Answer:

Step-by-step explanation:
Use formulas for the volumes:

1. When r=1,

2. When r=2,

3. When r=3,

4. When r=4,

5. When r=5,

Note that for all r,

Answer:
13.5
Step-by-step explanation:
7.5 percent *180=
(7.5:100)*180=
(7.5*180):100=
1350:100= 13.5