jrfranco45657 jrfranco45657 30-04-2020 Mathematics contestada Bethany sells roses and petunias. The expression 3 r + 2.5 p 3r+2.5p3, r, plus, 2, point, 5, p gives the cost (in dollars) of r rr roses and p pp petunias. What is the cost of 7 77 roses and 8 88 petunias?