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20. The sum of two numbers in thirteen, and the sum of their squares is 89. Find the two number

Mathematics

1 answer:

Gala2k [10]3 years ago

7 0

Answer:

x = 8 and x = -5

Step-by-step explanation:

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Answer:

The number of pages that Polina read was 90 and the number of pages that Marcus read was 18

Step-by-step explanation:

Let

x -----> number of pages that Polina read

y ----> number of pages that Marcus read

we know that

x+y=108 ----> equation A

x=5y -----> equation B

substitute equation B in equation A and solve for y

$5y+y=108\\6y=108\\y=18$

Find the value of x

$x=5y -----> x=5(18)=90$

therefore

The number of pages that Polina read was 90 and the number of pages that Marcus read was 18

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