Pleas help!! I’ll give brainliest! Add the equations.

2x - y = -7
+3x + y = 12

O A. 5x = 5
O B. - x = 5 5
O C. -x= -19
O D. 5x – 2y = -19

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

Find the area of the triangle shown 3 by 6