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mylen [45]
3 years ago
15

Use a number line to add or subtract. 3−(-1)=

Mathematics
1 answer:
Bogdan [553]3 years ago
8 0

Answer:

4

Step-by-step explanation:

rule 1 positive + positive= positive

rule 2 negative plus negative = negative

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3 years ago
seven different gifts are to be distributed among 10 children. How many distinct results are possible if no child is to receive
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Step-by-step explanation:

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C_{n,x} = \frac{n!}{x!(n-x)!}

The order is said to be not important if for example, John receiving the Buffalo Bills jersey and then Laura receiving the Cleveland Browns jersey is the same as Laura receiving the Cleveland Browns jersey before John receives the Buffalo Bills jersey.

In this problem, we have that:

Combinations of 7 from a set of 10 elements. So

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