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Musya8 [376]
3 years ago
15

5 (P-4)=2This problem is also hard for me:'(​

Mathematics
2 answers:
shusha [124]3 years ago
7 0

Answer:

.............

Step-by-step explanation:

...............

Elodia [21]3 years ago
6 0

Answer:

p = 36/5, or p = 7  1/5

Step-by-step explanation:

Next time, please include the instructions.

I think the goal is to solve this equation for p.

Let me write this equation as

(5/8)(p - 4) = 2

We can get rid of the fractional coefficient (5/8) by multiplying both sides of this equation by (8/5).  This gives us:

p - 4 = (8/5)(2).

Let's eliminate fractions again.  To do this, multiply all 3 terms by 5.  We'll then have:

5p - 20 = 16

Solve for p.  To do this, add 20 to both sides:

5p = 36

so that     p = 36/5, or p = 7  1/5

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So the car is moving at 651 revolutions per minute, with wheels of a radius of 18inches

so, one revolution, is just one go-around a circle, and thus 2π, 651 revolutions is just 2π * 651, or 1302π, the wheels are moving at that "angular velocity"

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notice, after all the units cancellations, you're only left with mi/hrs
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