Write an inequality and solve.

On the last three chemistry exams a student scored
81, 85, and 91. What score must the student earn on
the next exam to have an average above 85?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"

Askateboard ramp is in the shape of a right triangle what is the height of the ramp