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nata0808 [166]
3 years ago
13

  1) 5x-2y=4.         2) 3x-5y=13  x-2y=53x+y=9

Mathematics
1 answer:
Natali [406]3 years ago
5 0
\left\{\begin{array}{ccc}5x-2y=4\\3x+y=9&/\cdot2\end{array}\right\\+\left\{\begin{array}{ccc}5x-2y=4\\6x+2y=18\end{array}\right\\----------\\.\ \ \ \ \ 11x=22\ \ \ \ /:11\\.\ \ \ \ \ \ \ x=2\\\\3\cdot2+y=9\\6+y=9\\y=9-6\\y=3\\\\Answer:x=2;\ y=3


\left\{\begin{array}{ccc}3x-5y=13\\x-2y=5\end{array}\right\\\left\{\begin{array}{ccc}3x-5y=13\\x=2y+5\end{array}\right\\\\substitute:\\\\3(2y+5)-5y=13\\6y+15-5y=13\\y=13-15\\y=-2\\\\x=2\cdot(-2)+5=-4+5=1\\\\Answer:x=1;\ y=-2.
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How do you add and subtract integers?​
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5 0
3 years ago
Graph the function g(x)=10*(3/5)^t
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Answer:

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6 0
3 years ago
Given that a truck can drive 25 miles with four gallons of gas, how many gallons does it need to drive 125 miles?
slega [8]
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3 0
3 years ago
Read 2 more answers
Two consecutive even integers have the following property. When the smaller integer is added to three times the larger integer,
polet [3.4K]
 let x be the first integer
 x+ 2 the second integer  ( two consecutive even ) 

smaller integer  added to three times the larger  <span>x + 3 ( x+2)
  </span>two less than five times the smaller  <span>5x - 2</span>

x + 3 ( x+2)   =  5x - 2

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4 0
3 years ago
Danielle earns a 8.25% commission on everything she sells at the electronics store where she works. She also earns a base salary
jeka94

Danielle earned $979.75 last week.

Step-by-step explanation:

Base salary = $625 per week

Commission = 8.25%

Cost of items sold = $4300

Amount of commission = 8.25\% \of \cost\ of\ sold\ items

Amount\ of\ commission=\frac{8.25}{100}*4300\\Amount\ of\ commission=\frac{35475}{100}\\Amount\ of\ commission=\$354.75

Total earning last week = Base salary per week + amount of commission

Total\ earning = 625+354.75\\Total\ earning=\$979.75

Danielle earned $979.75 last week.

Keywords: Commission, Percentage

Learn more about percentages at:

  • brainly.com/question/5922969
  • brainly.com/question/6013189

#LearnwithBrainly

4 0
3 years ago
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