If y varies directly as x, and y is 20 when x is 4, what is the constant of variation for this relation?

What is the value of x in the following equation? -3x-2=2x+8

Segment an is an altitude of right δabc with a right angle at a. if ab = 2, squared 5 in and nc = 1 in, find bn, an, ac.

The dash figure is a dilation if the original figure. find the scale factor. classify the dilation as an enlargement or a reduction