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mote1985 [20]
3 years ago
14

A washer and a dryer cost $829 combined. The washer costs $71 less than the dryer. What is the cost of the dryer?

Mathematics
1 answer:
Mazyrski [523]3 years ago
7 0
The cost of the dryer is 450 because<span>829+71=900</span><span>900/2=450</span><span>450-71=379</span><span>379+450=829</span><span><span>So the dryer is 450$
Hope this helps!</span></span>
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Answer:

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Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 158.9

Standard Deviation, σ = 90.4

We are given that the distribution is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

We have to find the value of x such that the probability is 0.39

P( X < x) = P( z < \displaystyle\frac{x - 158.9}{90.4})=0.39  

Calculation the value from standard normal z table, we have,  

\displaystyle\frac{x - 158.9}{90.4} = -0.279\\\\x = 133.6784\approx 133.68  

P_{39}=133.68

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