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myrzilka [38]
4 years ago
10

the sum of a number and its opposite is always equal to zero. what situation models this property of addition.

Mathematics
1 answer:
olga_2 [115]4 years ago
4 0
I think it might be 0+0=0
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3 years ago
MATH QUESTION PLZ HELP
umka2103 [35]
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8.599 x 10^9

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3 years ago
Two mechanics Worked on a car The first mechanic charge $55 per hour The second mechanic charge $80 per hour the mechanics work
Tems11 [23]

a = hours worked by the first mechanic

b = hours worked by the second mechanic.

since the first mechanic charges $55 per hour, then for "a" hours that'd be a total of 55*a or 55a, likewise, for the second mechanic that'd be a total charge of 80*b or 80b.

we know all hours combined are 15, so then a + b = 15.

we also know that all charges combined are $950, so 55a + 80b = 950.

\bf \begin{cases} a+b=15\\ \boxed{b}=15-a\\ \cline{1-1} 55a+80b=950 \end{cases}\qquad \qquad \stackrel{\textit{substituting on the 2nd equation}}{55a+80\left( \boxed{15-a} \right)=950} \\\\\\ 55a+1200-80a=950\implies -25a+1200=950\implies -25a=-250 \\\\\\ a=\cfrac{-250}{-25}\implies \blacktriangleright a = 10\blacktriangleleft \\\\\\ \stackrel{\textit{since we know that}}{b=15-a\implies }b=15-10\implies \blacktriangleright b=5 \blacktriangleleft

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3 years ago
What is the length of the arc that measures 60° for the given circle?
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Could you show the given circle please?

3 0
3 years ago
45600 pounds = kg<br><br> *Round UP to the nearest 10th
aniked [119]

Answer:

45600 pounds = 20683.8 kg to the nearest 10th.

Step-by-step explanation:

Consider the provided measurement

1 kg = 2.20462 pounds

1 pound = 0.453592 kg

Multiply both the sides by 45600.

1×45600 pound = 0.453592×45600 kg

45600 pound = 20683.812 kg

Now convert it to the nearest tenths as shown.

45600 pound = 20683.8 kg

Hence, 45600 pounds = 20683.8 kg to the nearest 10th.

3 0
3 years ago
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