Each side should increase by 2x (left & right, and up & down) so that to match the condition :
7+2x)(6+2x) = 45
Solving it will give you: 4x² + 26x - 3
(y^2)^5 × y^8
Use the rule:

To get:
y^10, then, use the rule:

To eventually get:
y^(10+8) = y^18 or: y18 seeing as you wrote it like that.
Answer:
396 in ^3
Step-by-step explanation:
The volume of a rectangular prism is
V = l*w*h where l is the length, w is the width, and h is the height
V = 12 * 3 * 11
V = 396 in ^3