If 20% of the students in your class like McDonald's, how many students are in your class if 4 students like McDonald's?

Which graph represents the given linear function 4x+2y=3

What is the value of the product (3-2i)(3+2i)?

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