Which expression represents a difference of squares?

A.
t^2 + 100
B.
25k − 64
C.
81 − 49y^2
D.
4x^2 − 16x
the little up arrow symbolizes it being squared

25 ! the line of best fit is h = 5a + 86. predict the height at age 16.

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.