Aman travels from town x to town y at an average rate of 50 mph and returns at an average rate of 40 mph. he takes a 1/2 hour longer than he would take if he made the round trip at an average of 45 mph. what is the distance from town x to town y?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0

Three students, javier, sam, and corrine, participated in a fundraiser where people donated a certain amount of money per lap that the student ran. each student also had some initial donations that were collected before the run. the equations that represent each student's total donation, y, based on the number of laps ran, x, is shown below. match each equation with the correct rate of change for that student.