Operations with fractions

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?