Marnie pays $.06 per kilowatt-hour for electricity. She has budgeted $72 for her electricity. What is the greatest number of kilowatt-hours Marnie can use and stay within her budget?

1200 kilowatt-hours

Step-by-step explanation:

You want to divide 72 by .06 to get how many times .06 can go into 72. that answer is how many hours Marnie can use with $72, 1,200.

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.