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bezimeni [28]
3 years ago
6

Use elimination to solve: NN+ND=50 5NN+10ND=450

Mathematics
1 answer:
Tomtit [17]3 years ago
7 0
5NN+10ND=450\\5(NN+2ND)=450 \\ NN+2ND=90 \\ \\ \boxed{NN=90-2ND} \\ \\  NN+ND=50 =>\boxed{NN=50-ND} \\ \\ \\ 90-2ND=50-ND \\ -2ND+ND=50-90 \\ -ND=-40 \\ \\ \boxed{ND=40} \\ \\ NN=50-ND \\ NN=50-40 \\ \\ \boxed{NN=10}
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3 years ago
Divide $150 into the ratio 2:5:3
pentagon [3]

Answer:

$30, $75, $45

Step-by-step explanation:

We can set up an equation, where x is an unknown value:

2x+5x+3x=150

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Now that we know what x is, we can plug x in to solve for 2x, 5x, and 3x:

2x=2*15=30

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2 years ago
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6 0
3 years ago
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