Question

Betty bought 4 beads for 22 cents. The red beads were 10 cents each and the blue beads were 1 cent each. Find the number of red and blue beads.

Answer 1

Do you need to solve with an equation, or a system of equations, or is any method ok?

Answer 2

Any method is ok

Answer 3

Since the purcahse is only 4 items, we can list all possibilities:

Red beads Cost Blue beads Cost Total Cost
Number bought 0 0 4 4 4
Number bought 1 10 3 3 13
Number bought 2 20 2 2 22
Number bought 3 30 1 1 31
Number bought 4 40 0 0 40

Answer 4

2 red & 2 blue
X+y = 4
10x + 1y =22
10x + 4-x=22
9x=18
X=2.

Answer 5

two red and two blue

Answer 6

correct