What are the factor of this expressison 3*(a+2b)

Two vertices of a polygon are (7, −18) and (7, 18) . what is the length of this side of the polygon? enter your answer in the box. units

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.

In a timed typing test lara typed 63 words per minute.estimate the number of words she should be able to type in half in hour show your work