Question

You are playing a card game with red and black cards where the red cards (r) are worth five points and the black cards (b) are worth ten points. You currently have 11 cards and a total of 70 points. Which system of equations can be solved to find the number of each type of card you have?

A. 5r+b=11
5r+10b=70
B.r+b=12
r+b=70
C. 5r+10b=11
r+b=70
D. none of the above

Answer 1

5r + 10b = 70
r + b = 11

none of the above

Answer 2

any questions ?

Answer 3

so it's none of the above?

Answer 4

yep...the equation you would need are the ones I posted....not an answer choice

Answer 5

thanks

Answer 6

no problem :)