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9966 [12]
3 years ago
15

The distance between my house and Memphis is 150 km. If I drive in my car, it takes me 72 min to make the first 100 km of the dr

ive. If I keep traveling at the same rate, how many more minutes will it take to drive the remaining distance? Round your answer to the nearest tenth.
Mathematics
2 answers:
Cloud [144]3 years ago
4 0

Set up a ratio:

You drove 72 minutes and 100 km = 72/100

You want the number of minutes (x) to drive 150 km = x/150

Set the ratios to equal each other and solve for x:

72/100 = x/150

Cross multiply:

(72 * 150) = 100 * x)

Simplify:

10,800/100x

Divide both sides by 100:

x = 10800/100 = 108

This means it would take 108 minutes to drive 150 km.

Now subtract the time you have already driven to fin how much more you need:

180 - 72 = 36 more minutes.

Tasya [4]3 years ago
3 0

Answer:

36 min

Step-by-step explanation:

It takes 72 min to drive 100 km. 50 km are left to drive.

Half of the driving above is: It takes 36 min to drive 50 km.

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Answer:

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Step-by-step explanation:

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3 years ago
What are the solutions to the equation (x + 2)^2 = 49?
Mekhanik [1.2K]

Answer:

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(X+2)² =49

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(X+2) (X+2)= 49

Apply the distributive property;

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X²+2X+2X+4=49

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Move 49 to the left side of the equation;

X²+4X+4-49=0

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Apply Factorisation method;

Consider the form

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B =4 and C =45

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9+(-5)=4 and 9*(-5)= 45.

Replace X +4X-45=0 with (X-5) (X+9)=0

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4x−4=−8

Add 4 to both sides.

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Divide both sides by 4.

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