Does anyone know the answer to these?

Emily is entering a bicycle race for charity. her mother pledges $0.90 for every 0.75 mile she bikes. if emily bikes 18 miles, how much will her mother donate?

Explain how you could use the interactive table to tell if sets of points are on the same line. math 8

What is the solution to the system of equations? y=1.5-3 y=-x