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?

Answer 1

for a red marble you have 4 points and a blue you have 7, therefore the R(number of red marble) and B( blue marbles)
the answer is gonna be 4r+7b