In ΔABC, AB = 20 cm, AC = 15 cm. The length of the altitude AN is 12 cm. Prove that ΔABC is a right triangle.

Ahmed bought a car for $5000 which is the 80% of the original price of the car. Calculate the original price of the car.

Peter is at a lumber yard. He gets 2 free boxes of nails for every 10 boards he buys. Write an expression for the number of boxes of nails Peter will get if he buys n boards.

Slope of (8,3) and (-4,3)

What is (-2x3) 4 simplified

1. Elana spent 45 minutes at the library, half an hour at the grocery store, 20 minutes visiting a friend, and arrived home at 4:10 P. M. What time did she leave home?

Write 0.78 repeating as a fraction is simplest form,

Claire jogs around an oval track and is able to complete one lap in 5 minutes. If she jogs at the same pace for 42 minutes, how many laps would she be able to jog? Write an inequality and find the number of whole laps Claire completesm

What is the next number in this pattern? 0, 3, 15, 63

What is the value of p in the equation y2=-4x? p=?

Write a few sentences explaining how to determine whether a relation shown in a table or a graph is a function.