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2 years ago

11

The room numbers on one side of a school corridor are consecutive positive even integers. The product of The room numbers for tw

o adjoining rooms on that side is 7224. Find the room numbers.

1 answer:

Vinvika [58]2 years ago

8 0

Numbers are n, n+2 and we have n(n+2)=7224. Or
n^2+2n-7224=0
Using the quadratic equation
n=84. So n+2=86
The numbers are 84, 86

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Read 2 more answers

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valina [46]

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$z=\dfrac{x-\mu}{\sigma}\\\\\Rightarrow\ 1.75=\dfrac{x-60000}{1000}\\\\\Rightarrow\ x-60000=1750\\\\\Rightarrow\ x=61750$

Hence, the tread life of tire should be 61,750 miles if they want 96% of the tires to outlast the warranty.

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