ACELLUS
PQRS is an isosceles trapezoid.
What are the coordinates of R?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.

What are the greatest common factor of 75 and 30