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bekas [8.4K]
3 years ago
10

30(30 – x) = 540 What is the value for x?

Mathematics
1 answer:
madreJ [45]3 years ago
4 0

30(30 – x) = 540

distribute

900 -30x = 540

subtract 900 from each side

-30x = -360

divide by -30

x =12

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Therefore Josie drove  57.5 miles.

Step-by-step explanation:

Speed: The ratio of distance to time.

To find the distance we use the following formula

Distance= time \times speed

Given that Josie drove 45 minutes at 70 miles per hour.

45 \ minutes= \frac{45}{60}\ h=\frac34\ h

In 45 minutes, she traveled  = (70\times \frac34) \ miles

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The she drove 15 minutes at 20 mile per hour.

15 \ minutes= \frac{15}{60}\ h=\frac14\ h

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