What is the answer to this math problem -13+5+-4+5

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

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.

Which of the following functions corresponds to the above sinusoid? a. 10 cos πx - 5 b. -5 sin x - 5 c. -10 cos πx/2 - 0.5 d. 10 sin πx - 5