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joja [24]
3 years ago
8

Suppose that the water level of a river is 34 feet and that it is receding a rate of 0.5 foot per day. Write an equation for the

water level, L, after d days. in how many days will the level be 26 feet?
( y=mx×b)
Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
3 0
The equation: 34 - 0.5d = L

STEPS:
1) 34 - 0.5d = 26
+ 0.5d + 0.5d
2) 34 = 26 + 0.5d
-26 -26
3) 8 = 0.5d
/0.5 /0.5
4) 16 = d

it would take 16 days for the water to be at 26 feet
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Find two consecutive positive integers such that the sum of their squares is 421 .
maria [59]
We assume the two numbers are x and (x+1)
so x^2+(x+1)^2=421
x^2+(x^2+2x+1)=421
2x^2+2x-420=0
According to the formula of quadratic 
x=14 or-15
cuz we know the two numbers are integers
so x=14
therefore the other number is 15
To make sure that's correct
14^2+15^2=421

Hope that helps you!!


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Step-by-step explanation:

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Step-by-step explanation:

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