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Charra [1.4K]
3 years ago
6

Jayden has been reading a 275275275-page book for English class. On average, he has read about 101010 pages in 151515 minutes (\

text{min})(min)left parenthesis, m, i, n, right parenthesis. With a deadline looming, Jayden realizes that he won't finish in time unless he skims through the rest of the book. If he skims the book, he can cover 151515 pages in 10\,\text{min}10min10, space, m, i, n. If it takes Jayden 555 hours and 50\,\text{min}50min50, space, m, i, n to finish the book (reading and skimming combined), how many pages did Jayden have to skim through?

Mathematics
1 answer:
maxonik [38]3 years ago
8 0
First let's define variables:
 r: reading
 s: skimming
 We write the system of equations that adapts to the problem:
 r + s = 275
 (15/10) r + (10/15) s = 355
 We solve the system of equations:
 r = 206
 s = 69
 Note: see attached image for system solution.
 Answer: 
 Jayden had to skim 69 pages through

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(

b

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1

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±

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2

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. I'll use the second equation for simpler algebra.

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1

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=

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=

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(

1

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x

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=

−

1

2

:

2

=

a

(

−

1

2

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a

=

−

4

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y

=

−

4

(

−

1

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x

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b

>

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, otherwise many issues arise when trying to graph the function.

The only valid function is

y

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4

(

1

2

)

x

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