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In-s [12.5K]
3 years ago
11

The sum of four times a number and negative three is twelve. What is the number?

Mathematics
2 answers:
vlabodo [156]3 years ago
4 0
4(2n+3)=128n + 12=128n        = 0  n        = 0
AnnZ [28]3 years ago
3 0
The number is 3.75.
4n-3=12.
+3 to both sides
4n=15.
15 divided by4=3.75.

Checking Work:
4(3.75)=15
15-3=12.
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Answer:

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Step-by-step explanation:

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kolezko [41]

Answer:

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Step-by-step explanation:

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The domain of a linear equation and quadratic equation is all real numbers but since it dealing with time we must make sure the roots or x-intercepts is positive.

Looking at the quadratic equation, we can use the discramnt formula to see if all roots are positve.

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