.9/x = 2.7/48
what is x?

Alake near the arctic circle is covered by a sheet of ice during the cold winter months. when spring arrives, the ice starts to melt. s(t) models the ice sheet's thickness (in meters) as a function of time tt (in weeks). s(t)=-0.25t+4

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a

Which expression is the factorization of x^2+10+21