Question

Bethany sells roses and petunias. The expression 3r+2.5p3r+2.5p3, r, plus, 2, point, 5, p gives the cost (in dollars) of rrr roses and ppp petunias.
What is the cost of 777 roses and 888 petunias?

Answer 1

3r + 2.5p
 In this case to find the result, what you must do is substitute in the given formula the number of roses and the number of petunias given.
 Substituting we have:
 3 * (7) + 2.5 * (8) = 41
 answer
 the cost of 7 roses and 8 petunias is $ 41