Please Help! :)
Kathi and Robert had a pottery stand at the craft fair. They sold some of the pottery at the original price of $12.50. Then they decreased the price to $8.50. They sold 88 pieces of pottery. How many cost $12.50, and how many cost $8.50?
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OpenStudy (anonymous):
@Wriddler
OpenStudy (anonymous):
Theres not enough information to determine, is there any other info?
OpenStudy (anonymous):
Oops! I forgot to say that they made $852
OpenStudy (anonymous):
okay
OpenStudy (anonymous):
and 88 is total?
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OpenStudy (anonymous):
yes
OpenStudy (anonymous):
Okay, so let them sell x pieces at $12.50 and y at $8.50
OpenStudy (anonymous):
x+y=88
OpenStudy (anonymous):
12.5x + 8.5y = 852
OpenStudy (anonymous):
okay so i have to use the substitution method
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OpenStudy (anonymous):
12.5x + 8.5y = 852
x + y = 88
OpenStudy (anonymous):
12.5(88-y) + 8.5y = 852
OpenStudy (anonymous):
combine like terms.......
OpenStudy (anonymous):
1100 - 12.5y + 8.5y +852
OpenStudy (anonymous):
combinde again... (let me kno if I make a mistake plz)
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OpenStudy (anonymous):
One sec
OpenStudy (anonymous):
LEt me just look through what youve done so far
OpenStudy (anonymous):
1100-4y=852
OpenStudy (anonymous):
-4y+852=1100
OpenStudy (anonymous):
-4y=-248
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OpenStudy (anonymous):
y=62
OpenStudy (anonymous):
Good :) now you need to get x
OpenStudy (anonymous):
Ok I figured it out! thanks! its 26
OpenStudy (anonymous):
Yep, you need both for your answer I believe but good job, you understand now then?