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Luba_88 [7]
2 years ago
10

3x – 2y = -11 and 5x + y =-1?'

Mathematics
1 answer:
Grace [21]2 years ago
7 0

Answer:

2x + 3y

Step-by-step explain

5x - 3x = 2x

2y + (1)y = 3y

2x + 3y

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2 years ago
When three pipes fill a pool, they can finish in 12 hours. Two of the pipes can finish in 18 hours if they are working together.
ladessa [460]
3 pipes take 12 hours
⇒ In 1 hour, the 3 pipes can fill 1/12 of the pool

2 of the pipes take 18 hours
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Answer: It will take 36 hours for the third pipe to fill the pool.
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5 0
3 years ago
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ASAP HELPPPPPPPPPPPPPP MEEEEB PLEASE
Andru [333]

Answer:

250 questions

Step-by-step explanation:

65 is equal to 26% of the total number of questions so:

65 / total number of questions (x) is equivalent to 26 / 100

(65 and 26 are a fraction of the whole thing. it doesn't matter whether they go on the numerator or denominator, as long as they are either both on one or the other)

65/x = 26/100

you can simplify this into

26x = 6500

/26    /26

then you divide by 26 on both sides to isolate the variable

x = 250

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Answer:

\boxed{Option \ C}

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Percentage means "out of hundred" So measuring the rate in percentage we've to find it using "per 100 units".

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