12. Explain why is (+5) + (-7) = -2.

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14

Acircle has a radius of 12.6cm what is the exact length of an arc formed by a central angle measuring 120

Show all work to identify the discontinuity and zero of the function f of x equals 6 x over quantity x squared minus 36