Question

Jon and Lexi are playing a marble game. According to their rules, 4 points are awarded for each red marble collected and 7 points are awarded for each blue marble collected. Which expression represents Jon's total score if he has r red marbles and b blue marbles?
1. 4r − 7b2. 2r − 7b3. 11rb4. 4r + 7b

Answer 1

Answer: 4. $4r + 7b$

Step-by-step explanation:

Given : Jon and Lexi are playing a marble game.

According to their rules, 4 points are awarded for each red marble collected and 7 points are awarded for each blue marble collected.

Let r be the number of red marbles and b be the number of blue marbles.

Then , the expression represents Jon's total score if he has r red marbles and b blue marbles will be :-

$4\times r+7\times b=4r+7b$