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lina2011 [118]
3 years ago
15

6 less than the product of a number and 3 is -18..what is the number?

Mathematics
1 answer:
seropon [69]3 years ago
4 0
The product of a number and 3 can be represented as 3n (where n = unknown number). Then 6 less than 3n is 3n - 6. 

3n - 6 = -18
3n = -12
n = -4

Check: 
-4 x 3 = -12
-12 - 6 = -18 (this works!) 
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Step-by-step explanation:

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11) If A = {19, 20, 21, 24} and B = {17, 19, 20, 22), list the elements of A U B.
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Answer:

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Step-by-step explanation:

The symbol U is the union symbol, which denotes the union of two sets.

This means that given two sets A and B, the expression

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indicates all the elements that belong to either set A or set B.

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17, 19, 20, 21, 22, 24

So, the expression A U B indicates the set:

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Step-by-step explanation:

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