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andreev551 [17]
3 years ago
6

A1 plumbing service charges $35 per hour plus a $25 travel charge for a service call. Good guys plumbing repair charges $40 per

hour for a service call with no travel charge. How long must a service call be for the two companies to charge the same amount?
Mathematics
1 answer:
makvit [3.9K]3 years ago
4 0

5 hours long

35x5=175

175+25= 200

and thennn

40x5=200

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Harold wrote this equation to model the level of water in a pool over time. The variable x represents time in hours. f(x) = 3,50
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Answer:

The water level is falling.

The initial level of water in the pool was 3,500 units

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Step-by-step explanation:

The given function that models the water level is

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where x represents time in hours.

The function represents a straight line that has slope m=-225

Since the slope is negative, it means the water level is falling.

The initial level of water in the pool can found when we put x=0 into the function.

f(0)=3,500-225(0)


f(0)=3,500, hence the initial level is 3,500.


To determine the level of water in the pool after 14 hours, we put x=14 into the equation to get;

f(14)=3,500-225(14)

f(14)=3,500-3150


f(14)=350


To determine the water level after 4 hours we put x=4

f(4)=3,500-225(4)

f(4)=3,500-900

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x = 6 (24 divided by 4 is 6). 
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