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rjkz [21]
2 years ago
5

Answer this question ​

Mathematics
2 answers:
Natalija [7]2 years ago
7 0

9. The rational number that is equal to its negative is zero (0)

10. \sf \dfrac{1}{3} ( 6  \ * \ \dfrac{4}{3} ) can be written as \sf ( \dfrac{1}{3} *6)*\dfrac{4}{3}   using associate property.

associative property is when numbers are changed within the parenthesis with out the change in result.

<u>formula of associative property</u> : a(bc) = (ab)c

VARVARA [1.3K]2 years ago
5 0
The answer is zero

Hopes this helps :)
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Sarah saved $12.75 every week for a number of weeks, w. She received an additional $25 during the last week in which she saved m
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Step-by-step explanation:

since sarah is receiving 12.75 each week for a number of weeks, w (we don't know its value yet)  we know that first part of the equation: that 12.75 is the coefficient next to w. Then we have the extra 25, so we know that adding 12.75w and 25 would give us sarah's total amount, which is 114.25.

to find out what w represents, we have to solve for it. solving for w means isolating it on one side. so, what we can do first is subtract 25 from both sides. that would then make the equation:

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now there's nothing left to take out to isolate w, so we have:

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