Solve the simultaneous equation 3x^2-xy=0 and 2y-1

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?

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Which of these triangle pairs can be mapped to each other using two reflections?