I don't understand this... help?

Sort each of the functions f: IR → IR in ascending or descending terms.
a) f (x) = -2.4x + 12

b) f (x) = 5 / 9x - 2 c) f (x) = 1 + 2x

d) (x) = - 0.5x + 3

Which expression is equivalent to 5r6141 2r+st6

Someone answer asap for ! michele pushes a box d meters across a floor. she uses a force f, in newtons, to push the box. she pushes the box for t seconds. the formula p = fd/t calculates the power, p, in watts, that it takes for michele to complete the task. solve the formula for d.

Using elimination, what is -4x+2y=-12 4x+8y=-24