Ireally need ! ive tried this so many times and just cant get it! you!

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?

Which point lies on a circle with a radius of 5 units and center at p(6, 1)?

Consider the function f(x)=-5x+3 what is f(-2)