(-2)^2×5-7(9-5)
what's the answer? show work

Find the cosine function that is represented in the graph.

If chord ab is congruent to chord cd, then what must be true about ef and eg?

On #16 : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.