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Luba_88 [7]
3 years ago
12

Use the elimination to solve this equation. 2x+3y=55 9x+4y=105

Mathematics
1 answer:
seropon [69]3 years ago
6 0
X=5 y=15 (5,15). 
This is how you do it:
-4(2x+3y=55): -8x-12y=-220
3(9x+4y=105):27x+12y=315

You add the two new equations together, canceling out the y values, and get the x value. Then, you go back and plug in the x value in the original equation to get the y value.

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The table below shows the earnings, in thousands of dollars, for three different commissioned employees.
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Answer:

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Step-by-step explanation:

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  • Emp 2 (Straight commission employee)      = 7% on all sales
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# Below table shows the earnings (in thousands of dollars)  

     Month              Emp 1                           Emp 2                      Emp 3

  December             4.4                               5.6                            5.2

  January                 3.5                               3.85                           3.6

  February                4.7                               4.9                             4.4          

Let the sale of Emp 1 be $x

2,000 + 3% of x = 4400

0.03x=4400-2000

x=$73,333

Let the sale of Emp 2 be $y

7% of y = 5600

y=$80,000

Let the sale of Emp 3 be $z

5% of $40,000 + 8% of (z-40000) = 5200

2000 + 0.08z - 3200 = 5200

0.08z = 5200+3200 - 2000 = 6200

z=$77,500

Therefore,   y>z>x

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y is straight commission employee.

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