Only 17 and 18 plz it's math least to greatest

(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.

Solve the formula ax+ by = c for x.

The tree filled 3/4 of a cup in 1/2 and hour at what rate does syurup flow from the tree