Answer:
12
Step-by-step explanation:
x^2 - a
If a is a perfect square we could factor
x^2 - b^2 = (x-b)(x+b)
So a cannot be 36,49,81 since they are perfect squares
a must be 12
X 0 y was 30
at x 12 y is about 55
12-0 = 12
55-30 = 25
25/12 = 2.08 inches per year average
so answer should be D
Answer:
1. x=11/4
Step-by-step explanation:

u should x 20 then u will get





Answer:
you muliply first 9×7 and then carry the remainder to the other side and then 9×2 and add the remainder