Please help?? I don't have that much time

Which terms are like terms? 2x, -3, 5b, 0

If 1/2+2/5s=s-3/4,what is the value of s? a. s=3/4 b. s=25/12 c. s=-25/12 d. s=-3/4

Can't gugys answer the ratio question. this is urgent the plans of a building is drawn toward scale of 1: 1000. kfc the foyer on the plans measures 62mm by 54mm, how large is the foyer in real life?

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)