Which of the following is the equation for the line perpendicular to the line y=−x+20 that passes through the point (−4, 2)? A)Y = -x + 6
B)Y = x - 2
C)Y = x + 6
D)Y = -x - 2

Lorne subtracted 6x3 – 2x + 3 from –3x3 + 5x2 + 4x – 7. use the drop-down menus to identify the steps lorne used to find the difference.

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.