Do the functions have the same concavity? f(x)=-x^2+40x+120 y=g(x)

Find the commission on a $590.00 sale if the commission is 15%.

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11

Estimate the time en route from majors airport (area 1) to winnsboro airport (area 2). the wind is from 340° at 12 knots and the true airspeed is 136 knots. magnetic variation is 5° east.