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harina [27]
3 years ago
9

Rafael reads 3/4 chapters in 4/5 hours

Mathematics
1 answer:
Inessa [10]3 years ago
4 0
I do not know the full question being asked, but if he reads 3/4 chapters in 4/5 hours, he would read 6/4 chapters, or 1 1/2 chapters in 1 3/5 hours.

Please mark Brainliest if helpful!
If this isn’t your question, please provide it fully in the comments of this answer. :))
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Answer:

z = -12

Step-by-step explanation:

The given system of equations is:

xy/(x + y) = 1 ...........................(1)

xz/(x + z) = 2...........................(2)

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2x/(x - 2) = 3y/(y - 3)

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Using this in (7), we have

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Using this in (4)

5y/7 = y/(y - 1)

1/(y - 1) = 5/7

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y = 12/5..........................................(9)

Using this in (8)

x = 5(12/5)/7 = 12/7 .......................(10)

Using (10) in (5)

z = 2x/(x - 2)

z = 2(12/7) ÷ (12/7 - 2)

= 24/7 ÷ -2/7

= 24/7 × (-7/2)

= -24/2 = -12

z = -12.

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