Quan is shopping. He can buy 2 pairs of pants and 1 shirts for $79.85 ( before tax is added). He can buy 1 pair of pants and 2 shirts for $69.85 (before tax is added). To figure out how much a shirt or a pair of pants costs,you must first identify the conditions. What is one of the conditions in this problem?

Question

a) items for $79.85
b) 1 pair of pants and 2 shirts for $69.85
c)3 items total
d) the cost of a shirt

i would like to know if my answer is right or wrong. a

Answer 1

what is the solutionof the following linear system?

2x + y = -1
x + 1/2y =-1/2

a) (2,1)
b) none
c) (1/2,-2)
d) infinite number of solutions