Which function is a quadratic function?
c(x) = 6x + 3x3
od(x) = x - 8x4
o p(x) = -5x – x2
k(x) = 2x2 + 9x4

Δabc is dilated by a scale factor of 3 with the origin as the center of dilation to form δa′b′c′. the slope of is -1.2. the length of is p units, the length of is q units, and the length of is r units. the slope of is . the length of is units.

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Find two numbers if their sum is 91 and the ratio is 6: 7?