(11m-7m)-(2m+6m) the sum or differce

Anyone know? will mark brainliest if correct

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.

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