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siniylev [52]
3 years ago
5

I need help with these ASAP thanks

Mathematics
1 answer:
Nataly_w [17]3 years ago
4 0

Answer:

a. y=\frac{2x}{x-5}

b. y=\frac{2-4x}{x-3}

Step-by-step explanation:

change switch x and y and then solve for y.

a. x=\frac{5y}{y-2}

x(y-2)=5y

xy-2x=5y

xy-5y=2x

y(x-5)=2x

y=\frac{2x}{x-5}

same for b.

b. x=\frac{3y+2}{y+4}

x(y+4)=3y+2

xy+4x=3y+2

xy-3y=2-4x

y(x-3)=2-4x

y=\frac{2-4x}{x-3}

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<h3>How many feet should she buy?</h3>

The mathematical operations that would be used to determine the answer are addition and multiplication.

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The first step is to convert yard to feet

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8 0
1 year ago
The U.S. Census Bureau announced that the median sales price in 2014 for new homes was $282,800 and the mean sales price was $34
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Step-by-step explanation:

Given data:

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Total number of sample = 100

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z = \frac{\bar x - \mu}{\frac{\sigma}{\sqrt{n}}}

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B)

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z = \frac{350000 - 345800}{\frac{90000}{\sqrt{100}}}

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FROM NORMAL DISTRIBUTION TABLE Z VALUE FOR

P(Z\leq 2.133) = 0.9836

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SO,  = 0.9836 - 0.6796 = 0.3040

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