The answer is 894cm<span> ². 13 x 9 x 2 + 15 x 9 x 2 + 15 x 13 x 2 = </span>894
Answer:

Step-by-step explanation:
So we have the equation:

First, distribute the 7 into the (x+8) and simplify:

Combine the like terms 7x and 8x by adding them together:

Subtract 56 from both sides to isolate the x:

Divide both sides by 15 to get x:

Answer:
I think a or C
Step-by-step explanation: