Given that f(x) = 2x+3 and g(x)=x^2-4x-6, find (g o f) 6

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

Δabc is reflected across line l to form δ alblcl, and a¯¯¯al¯¯¯¯ intersects line l at point d. which equation is not necessarily true?

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor