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Setler [38]
3 years ago
8

What is the elimination of 20x+5y=120 and 10x+7.5=80

Mathematics
1 answer:
Grace [21]3 years ago
5 0
20x+5y=120
10x+7.5y=80    multiply this one by 2
___________

20x+5y=120
20x+15y=160   subtract 

___________

        -10y=-40    divide both sides by -10 
____________

             y=4         

20x+5(4)=120   plug 4 in for y in the first equation 
20x+20=120     multiply 
20x=100           subtract 
x=5                   divide to find x




 
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3 years ago
Carl buys 1.5 pounds of grapes. The
Umnica [9.8K]

Answer:

$3.51

Step-by-step explanation:

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2 years ago
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3 years ago
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5 0
2 years ago
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Why is the point (12, 780) significant on the graph of the functions representing these three salesmen? Use complete sentences t
patriot [66]

Answer:

Hope this helps 0>0

Step-by-step explanation:

Let x represent the number of sales each man had.

For Salesman A, he earns $65 per sale; this is 65x.

For Salesman B, he earns $40 per sale; this is 40x.  We also add to this his weekly salary of $300; this gives us 40x+300.

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2 years ago
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