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Andrei [34K]
3 years ago
10

3r/4= 1/8 what's the value of r

Mathematics
2 answers:
olya-2409 [2.1K]3 years ago
8 0
\frac{3r}{4} =\frac{1}{8}

Cross multiply.
Note: \sf\frac{a}{b} = \frac{c}{d} \to ad=bc

Cross multiplying we get:

3r(8) = 4(1) \\ 24r = 4\\r = \frac{4}{24} \\\\r=\frac{1}{6}

I hope that helps :)
tino4ka555 [31]3 years ago
5 0
Multiplying both sides by 8, we see that 6r=1.  Dividing by 6, r=1/6.
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poizon [28]

Answer: y=15/x

For this problem you need to use trial and error.

For the first equation, 15-14 does equal 1, but 5-14 doesn’t equal 3. For the second equation, 15x15 doesn’t equal 1. For the third equation, 15+2 doesn’t equal 1. For the last equation, 15/15 is 1, 15/5 is 3, and so on. So, the last equation shows the relationship in the table.

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7 0
2 years ago
Translate the following phrase to an expression: the product of a number and 2.
liq [111]

Answer:

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Step-by-step explanation:

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6 0
3 years ago
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4 0
3 years ago
a parking meter accepts only 20p coins or 50p coins.On one day, 39 coins were collected with a total value of $11.40. find how m
Snowcat [4.5K]

Answer:

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Proof:

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6 0
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