Amath teacher assigns three projects. she gives the students five project options to choose from. how many different groups of projects can students choose from?

An equation in slope-intersept form the lines that passes thought (-8,1) and is perpindicular to the y=2x-17.

The length of the line segment ac is 8x-9 what is the value of x

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.