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?

4r − 7b

2r − 7b

11rb

4r + 7b

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?

4r − 7b

2r − 7b

11rb

4r + 7b

mertsj · Answer

I feel certain that you can figure this out.  How much is a red marble worth?

anonymous · Answer

7points

mertsj · Answer

What about 2 red marbles.  How much are they worth?

anonymous · Answer

wait red=4&blue=7

mertsj · Answer

Ok.  How much is 1 red marble worth?

anonymous · Answer

4points

mertsj · Answer

How much are 2 red marbles worth?

anonymous · Answer

8

mertsj · Answer

That would be 2 times 4.
How much are 3 red marbles worth?

anonymous · Answer

12

mertsj · Answer

That would be 3 times 4
How much are 4 red marbles worth?

mertsj · Answer

1 red marble= 1 times 4
2 red marbles = 2 times 4
3 red marbles = 3 times 4
4 red marbles = 4 times 4
5 red marbles = 5 times 4
r red marbles = 4 times 4 = 4r

anonymous · Answer

imma on an timed test so please hurry thanks

mertsj · Answer

1 blue marble = 1 times 7
2 blue marbles = 2 times 7
3 blue marbles = 3 times 7
4 blue marbles = 4 times 7
5 blue marbles = 5 times 7
b blue marbles = b times 7 = 7b
Altogether r red marbles and b blue marbles = 4r + 7b