This is a rectangular cake, and there are 3 measurements, meaning that you are evidently finding volume.
Let's go back, first off, the formula for volume is...
V = L x W x H (
Length,
Width,
Height)
Your measurements are 9 in, 13 in, 2 in.
All you need to do is follow the formula and multiply them.
9 x 2 = 1818 x 13 = 234 
Your answer is
C: 234 
Hope this helps!
6x8=
{6x 4} + {6x 4 }
= + =
24 24
48
9x-3xy
Factor out 3x from both terms.
3x(3-y)
answer: 3x(3-y)
For number 19:
"at least 150" means either 150 ≤ ? or ? ≥ 150
plus 3 so +3x
The answer would be 150 ≤ 100 + 3x
Number 20:
A is at -2.5. The inverse is the opposite so 2.5
The equation is not going to make sence