Which expression is equivalent to 3.5x + 4.8?

(a.) 3 • 0.5x + 4 • 0.8

(b.) 3x • 0.5x + 4 • 0.8

(c.) 3 + 0.5x + 4 + 0.8

(d.) 3x + 0.5x + 4 + 0.8

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?

What is the length and width of a 84.5 square foot rug? will mark

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4