Mr. Lee was working out this algebraic expression: 0.3(8 + 5a – 0.6) and came up with the simplified answer to be 8.3 + 5.3a – 0.3. Aiden and Crissa recognized that he made a mistake. What was the mistake?

In the diagram below, dab and dac are adjacent angles. if mdac = 25°, what is mdab in degrees? what is mbac in degrees?

Given the median qr and trapezoid mnpo what is the value of x?

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.