For which value of x is the line l parelpel to line m

Given that abcd is a rhombus, what is the value of x?

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.

Which of the following circles have their centers in the third quadrant? check all that apply.