Find the gradient of the straight line joining the two points. (1,7) and (-1,-7)

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?

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

The surface area of the triangular prism is .