Suppose that triangle abc is dilated to a'b'c' by a scale factor of 4 with a center of dilation at the origin. what is the distance from the center of dilation to the midpoint of b'c'? a) 2 units b) 4 units c) 6 units d) 8 units

1. what are the missing reasons in the proof 2. it's in the second picture and 3

The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

Simplify the expression below -3(10x+4y)+6(6x-2y)