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Misha Larkins [42]
2 years ago
9

Solve for x.

Mathematics
1 answer:
lidiya [134]2 years ago
7 0

Answer:

x = 1/4

Step-by-step explanation:

<u>Calculations:</u>

7(x-3)+3(4-x)=-8

7x-21+12-3x=-8

4x-9=-8

4x=1

x=\frac{1}{4}

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A 46 gram sample of a substance that is used to sterilize surgical instruments has a k-value of 0.1374. Find the substance's hal
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Answer:

  t=5.0days

Step-by-step explanation:

Using the formula for the exponential decay that is N=N_{0}e^{-kt}, we have N=\frac{1}{2}{\times}46=23, N_{0}=46 and k=0.1374.

Thus, N=N_{0}e^{-kt} becomes

23=46{\times}e^{-0.1374t}

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4 0
3 years ago
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