I need help doing this please

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Aline passes through 3,7 and 6,9 what equation represents the line

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.