You bought socks for all your friends. Fancy socks cost $15 a pair, and plain socks cost $8 a pair. You have 12 friends, spent exactly $117. How many pairs of each type of sock did you buy?

9 socks for $8

3 socks at $15

Step-by-step explanation:

117 = (15 * x) + (8 * y)

8*9 = 72

15 * 3 = 45

72+ 45 = 117

9 socks at $8

3 socks at $15

answer is 67%

step-by-step explanation:

correct answer:

b.(19,-2)