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WITCHER [35]
3 years ago
9

PLEASE! Need help on number 28. Explanation also. Thanks

Mathematics
1 answer:
lys-0071 [83]3 years ago
4 0
If the bleachers seat only 60 people then you should subtract 60 from 450 so that you know how many people are left to fill in the 26 rows. 450-60 is 390
There are 390 people left and 26 rows 
Divide 390 by 26 so that you will find out how many people you can seat per row. 
390/26 is 15 
Your answer is 15 people per row
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If f(x) =5x + 12 what is f-1(x)
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To find the inverse of a function, first, let's switch f(x) with y

y=5x + 12

Now, change all the x's into y's and change all the y's into x's

x=5y+12

Now, let's solve this equation in terms of y.

Subtract both sides by 12

x-12 = 5y

Divide both sides by 5

\frac{x}{5} -  \frac{12}{5} =y

Flip the equation so we have the y on the left

y=\frac{x}{5} - \frac{12}{5}

Now, replace the y with f^{-1}(x)

f^{-1}(x)=\frac{x}{5} - \frac{12}{5}

That's your answer. If you need any clarifications, feel free to comment.

Have an awesome day! :)
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Step-by-step explanation:

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