Steps for solving 5(2x-8)=20 which is not a step to solve the problem

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?

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i