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tatuchka [14]
3 years ago
11

What is the length of a rectangle with width 10 inches and area 45 inches^2? Use 3.14

Mathematics
1 answer:
gogolik [260]3 years ago
4 0
Why would we need 3.14 as pi? The answer is 45/10 = 4.5 inches.
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Answer:

7 gallons were used for city driving.

Step-by-step explanation:

I am going to solve this question by a system of equations.

I am going to say that:

x is the number of gallons driven in the city.

y is the number of gallons driven in the highway.

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This means that x + y = 19

Carole's car averages 13.2 mi/gal in city driving and 25.3 mi/gal in highway driving. If she drove a total of 396.0 mi.

This means that 13.2x + 25.3y = 396

How many of the gallons (to the nearest gallon) were used for city driving?

This is x

From the first equation, i will have

y = 19 - x

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13.2x + 25.3(19 - x) = 396

13.2x - 25.3x = 396 - 480,7

12.1x = 84.7

x = \frac{84.7}{12.1}

x = 7

7 gallons were used for city driving.

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