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Dmitry_Shevchenko [17]
3 years ago
8

To which subset of real numbers does -18 not belong?

Mathematics
1 answer:
jarptica [38.1K]3 years ago
3 0
The subsets of the real numbers are the irrational numbers, rational numbers, integers, whole numbers, and the natural numbers. First, figure out where does -18 belong? Well, -18 is a rational number because it can be expressed as a fraction of two integers. It's also an integer.

So, it doesn't belong in the sets of irrational numbers, whole numbers, and the natural numbers.
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a beverage is made by mixing 3 parts of water with 5 parts of fruit juice how many parts of water are mixed with 1 part on fruit
Fittoniya [83]

Answer:

\frac{3}{5}=0.6

Step-by-step explanation:

Given the initial ratio of 3 parts water to 5 parts fruit juice, you can set up a proportion (equivalent ratios) to determine the amount of water needed with just 1 part of fruit juice:

\frac{water}{fruit}=\frac{3}{5}=\frac{x}{1}

cross multiply: 5x = 3

divide: 5x/5 = 3/5 or x = 3/5

3/5 = 0.6 parts water

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3 years ago
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Alisiya [41]
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warehouse A has 200 tons of coal and sells 15 tons every day. warehouse B has 80 tons and buys 25 everyday in how many days does
forsale [732]

Hey there! I'm happy to help!

Let's represent the number of days with x.

WAREHOUSE A

200-15x

WAREHOUSE B

80+25x

We want to find how many days it will take for the two warehouses to have the same amount of coal. Let's put these expressions into an equation to show that they are equal and see what x is.

200-15x=80+25x

We subtract 25x from both sides.

200-40x=80

We subtract 200 from both sides.

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We divide both sides by -40

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Therefore, warehouse A and warehouse B will have the same amount of coal after 3 days.

Have a wonderful day! :D

7 0
3 years ago
Radical 18 times radical -2
melisa1 [442]

Answer:

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Step-by-step explanation:

First, I think you mean square root 18 and square root 2. (Let me know if thats right.)

Thus we have square root -36, which is simplified to 6i (we have to use imaginary numbers)

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