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Vladimir [108]
3 years ago
9

HELP 25pts and will mark brainliest. I NEED THIS NOW!! Which expression shows the result of applying the distributive property t

o −2(13x−15) ?
2/3x - 2/5

-2/3x - 2/5

2/3x + 2/5

−2/3x+2/5
Mathematics
1 answer:
Arte-miy333 [17]3 years ago
6 0
The last bottom problem
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A store is having a sale on walnuts and chocolate chips. For 7 pounds of walnuts and 9 pounds of chocolate chips, the total cost
Jlenok [28]

Answer:

  • Walnuts  cost $1.75, chocolate chips cost $2.75

Step-by-step explanation:

<h3>Let the costs be:</h3>

  • Walnuts - x
  • Chocolate chips - y

<h3>Set equations as per question</h3>

For 7 pounds of walnuts and 9 pounds of chocolate chips, the total cost is $37:

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For 5 pounds of walnuts and 3 pounds of chocolate chips, the total cost is $17:

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<h3>Solve the system by elimination</h3>

Multiply the second equation by 3 and subtract the first equation, solve for x:

  • 3(5x + 3y) - (7x + 9y) = 3(17) - 37
  • 15x + 9y - 7x - 9y = 51 - 37
  • 8x = 14
  • x = 14/8
  • x = 1.75

Find the value of y:

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  • y = 24.75/9
  • y = 2.75
6 0
1 year ago
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