For an equation 9-3x=21, the first step is A. Subtract 9 from both sides
B. Add 9 to both the sides
C. Divide 2 on both the sides
D. None of these

Twelve less than a number is at most 20

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.

Find the common ratio of the sequence. -4, 8, -16, 32, a: -12b: -2c: 12d: -1/-2