Question

31. Dorothy buys her groceries online. The total cost that Dorothy pays is the sum of the

cost of her groceries and a flat-rate shipping fee of $6.1. Which equation shows the
correct relationship between the cost of Dorothy's online grocery purchases and the
total cost, including shipping?
A. R = X + 6.1, where X represents total cost ($) and R represents groceries ($).
B. R = 6.1X, where R represents total cost ($) and X represents groceries ($).
C. X = R - 6.1, where R represents total cost ($) and X represents groceries (5).
D. R = x + 6.1, where R represents total cost ($) and X represents groceries ($).

Answer 1

D) R = x + 6.1

Explanation:

Let x represent groceries

R represents the total cost

Total cost = cost of groceries + flat rate shipping fee

R = x + 6.1