If y=45 and x=75
what is 5x+4y=

Need solving this second acceleration problem.

How do i take any fraction and make it into a decimal or percentage?

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.