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yofavvmk
22.09.2019 •
Mathematics
Afurniture shop refinishes tables. employees use one of two methods to refinish each table. method i takes 1.5 hours and the material costs $10. method ii takes 2.5 hours, and the material costs $5. next week, they plan to spend 308 hours in labor and $1260 in material for refinishing tables. how many tables should they plan to refinish with each method?
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Ответ:
1.5x+2.5y=308. Hours spent
10x+5y=1260. Cost
Multiply the equation 1 by 2
3x+5y=616
10x+5y=1260
Subtract the equation 1 from the equation 2 to get
7x=644
X=644÷7
X=92. number of method I tables
So then
10 (92)+5y=1260
920+5y=1260
5y=1260-920
5y=1,260−920
5y=340
Y=340÷5
Y=68 number of method II tables
Ответ:
since there is 100 people this is easy since each person equals 1 5 so 56+19=75 . 75-100= 25 so 25% didn't order anything