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stich3 [128]
3 years ago
13

When 40% of a number is added to twice the number, the result is 88. What is the number?

Mathematics
2 answers:
iVinArrow [24]3 years ago
8 0

Answer:

36.67 or 36 and 2/3

Step-by-step explanation:

.4x + 2x = 88 divide by .4

x + 5x = 220 add like terms

6x = 220 divide by 6

x = 36.67 or 36 and 2/3

Leni [432]3 years ago
7 0
17.6 because you do the working out backwards :)
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Explanation:

Even though your teacher doesn't want you to list the items of the set, it helps to do so.

We'll be working with these two sets

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When we union them together, we combine the two sets together. Think of it like throwing all the letters in one bin rather than two bins.

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The stuff that isn't bolded is set A, while the stuff that is bolded is set C

After we toss out the duplicates, we end up with this

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But wait, that's just set A. Notice how everything in set C can be found in set A. This indicates set C is a subset of set A.

That's why all of the stuff in bold was tossed out (because they were duplicates of stuff already mentioned).

Once we determine what set A u C looks like, we count out the number of items in that set to determine the final answer.

There are 10 items in {b, d, f, h, j, I, n, p, r, t} which means 10 is the final answer.

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An alternative method is to use the formula below

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