Y = 2x + 9 + x
is this equation linear or nonlinear?

Acar with a mass of 600 kg is traveling at a velocity of 10m/s. how much kinetic energy does it have?

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.