Answer:
See below.
Step-by-step explanation:
So we want to prove that:

First, simplify √8. This is the same as:

Therefore, our equation is now:

Combine like terms on the left:

The square root of something is the same as taking that number to the one-half power. Thus:

Rewrite:

And we're done!
Answer:
M has 41 CDs
Step-by-step explanation:
Joel = 2 x M
(Joel -7) / 3 = Black
Black = 25
Joel - 7 = 3 x Black = 3 X 25 = 75
Joel = 75 + 7 = 82
M = 82 / 2 = 41
Answer:
x²/9 − (y + 1)²/81 = 1
Step-by-step explanation:
-2y − 82 + 9x² = y²
9x² = y² + 2y + 82
9x² = y² + 2y + 1 + 81
9x² = (y + 1)² + 81
9x² − (y + 1)² = 81
x²/9 − (y + 1)²/81 = 1