Which equation represents a proportional relationship? a. y=2(x+1) b. y = 4x + 3 c. y=32x d. y=−2x will give brianlyest

If the measure of xyz is 81 what is the measure of yz

Suppose that 15 inches of wire cost 60 cents. at the same rate, how much (in cents) will 12 inches of wire cost

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your