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aivan3 [116]
3 years ago
13

Evaluate the expression when a = 7 and c= -4. -a+5c pls help

Mathematics
1 answer:
charle [14.2K]3 years ago
4 0

Answer:

-27

Step-by-step explanation:

a = 7 and c = -4

- a + 5 c

- ( 7 ) + 5 ( - 4 )

- 7 - 20

- 27

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One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, how man
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Answer: 144 minutes

Step-by-step explanation:

Based on the information that has been given in the question, the minutes that the slower pipe alone can use in filling the tank can be denoted by y minutes.

Therefore, the faster pipe will fill it in 1/3 × x = x/3 minutes.

Therefore,

1/x + 3/x = 1/36

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The number of minutes taken by the slower pipe will be 144 minutes.

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3 years ago
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IRINA_888 [86]
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EastWind [94]

Answer:

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8 0
2 years ago
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