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Debora [2.8K]
4 years ago
10

Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 4 h, and Car B traveled the dista

nce in 4.5 h. Car B traveled 5 mph slower than Car A.
(The formula R⋅T=D , where R is the rate of speed, T is the time, and D is the distance can be used.)

How fast did Car B travel?
Mathematics
1 answer:
Kamila [148]4 years ago
8 0

40mph for Car B I think. 45mph for Car A. 45(mph) times 4(h) is 180(distance) and 40 times 4.5 is also 180. Sorry if I'm wrong.

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Answer:

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Step-by-step explanation:

After giving some to his neighbor, Sam has 1 -2/5 = 3/5 of the original quantity left. After giving some to his cousin, he has (3/5)(1 -4/9) = (3/5)(5/9) of the original quantity left.

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  15 rolls = (1/3)·(original number) . . . . . . Sam has 15 roll left

  45 rolls = original number . . . . . . . . . . . multiply by 3

_____

<em>Check</em>

Same gave 2/5·45 = 18 rolls to his neigbor, so had 27 left. Sam gave 4/9·27 = 12 to his cousin, so had 15 left.

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Two planes intersect in a line that contain all common points of these two planes.

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Note that notation \overline{BF} stays for segments and notation \overrightarrow{BF} stays for rays.

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