A pencil at a stationery store costs $1, and a pen costs $1.50. Shawn spent $12 at the store. He bought a total of 9 items. Which system of equations can be used to find the number of pencils (x) and pens (y) he bought?
1.5x + y = 12
x = 9y
x + 1.5y = 12
x + y = 9
x + 9y = 12
x = 1.5y
9x + y = 12
x = 1.5y
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OpenStudy (anonymous):
The first line is going to be to find the costs. So assign the cost of the pencil to the x and the cost of the pen to the y. The number after the = will be the total he spent.
OpenStudy (captainfluffy):
ok... ill try that
OpenStudy (captainfluffy):
do i combined 1$ and 1.50$?
OpenStudy (anonymous):
Put the 1 to the x and the 1.5 to the y
OpenStudy (captainfluffy):
ok
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OpenStudy (captainfluffy):
its C then?
OpenStudy (anonymous):
Why do you think c?
OpenStudy (captainfluffy):
cause X=1 and if u have just X it means the same as 1X right? so then that would be the only one
OpenStudy (anonymous):
But c has "9y". Which obviously isn't correct.
OpenStudy (captainfluffy):
oh i didnt look that far ¯\_(ツ)_/¯
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