Explain how multiplying with 6 is like multiplying with 3

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.

1.two more than the quotient of a number and 6 is equal to 7 use the c for the unknown number translate the sentence into an equation

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.