I think the length of pool in inches is actually 12*12=144 because there are 12 inches in a foot.
Also, the scale factor would be 144/16 = 9.
5x-14x=9-90
-9x=-81
9x=81
x=81/9
x=9
<span>10x - 3(2x + 5)
= </span><span>10x - 6x - 15
= 4x - 15
answer
</span><span>a) 4x - 15</span>
