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4 years ago

13

A patient tells the nurse that she has smoked two packs of cigarettes a day for 20 years. the nurse records this as how many pac

k-years?

1 answer:

Zina [86]4 years ago

5 0

There are 365 days in a year
2 packs x 365 days = 730 packs per year

check work:

730 divided by 2 = 365

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Answer:

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Step-by-step explanation:

The given system is

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For 0.4(20y+15)=x, we expand to get:

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$8y= x - 7$

Divide through by 8

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Therefore the system in slope-intercept form is:

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

$y = \frac{1}{8}x - \frac{7}{8}$

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