A school requires 2 teachers for every 15 students. Write a proportion that gives the number t of teachers needed for 105 students.

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.