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lions [1.4K]
2 years ago
11

1/5x-2/3y=30 when y=15

Mathematics
1 answer:
dolphi86 [110]2 years ago
5 0

Answer:

Step-by-step explanation:

<u>Step 1:  Set y to 15 and solve</u>

<u />\frac{1}{5}x - \frac{2}{3}*15=30

\frac{1}{5}x-10=30

<em>Add 10 to both sides</em>

<em />\frac{1}{5}x-10+10=30+10

\frac{1}{5}x=40

<em>Multiply both sides by 5</em>

<em />\frac{1}{5}x*\frac{5}{1}=40*\frac{5}{1}

x=200

Answer:  x=200

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Answer:

520

Step-by-step explanation:

This problem is

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Therefore, substituting in, gives us:

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t = 520

5 0
3 years ago
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liberstina [14]

Answer:

4. 27

Step-by-step explanation:

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4 0
3 years ago
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5 0
3 years ago
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Reil [10]

Answer: Ratio of black horses to all horses = 59/62

Step-by-step explanation:

Total number of horses = 62

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Assuming that the rest horses are black. That means the total number of black horses would be 62-3 =59. So there are 59 black horses and there are 3 white horses.

Ratio of black horses to all horses will be the total number of black horses / the total number of horses.

Ratio of black horses to all horses

= 59/62 or 59:62

It can also be expressed in decimals which will become

0.952

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