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In-s [12.5K]
3 years ago
6

3/4 divided by 5 1/5 =

Mathematics
1 answer:
anyanavicka [17]3 years ago
5 0
0.1442
0.1714
0.05487
0.2075
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-98

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Dexter wrote checks and made the deposits shown in his check registry. What was the change in his balance after these transactio
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When two computers are working together, they can finish updating software in 9 minutes. How long would they take individually t
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First computer takes x min. For 1 min it does 1/x part of work.

Second computer takes (x+24) min. For one min it does 1/(x+24) part of work.

Both computers for one min do   (1/x+1/(x+24)) part of work.

At the same time, both computers for one min do 1/9 part of work.

\frac{1}{x} + \frac{1}{x+24} = \frac{1}{9} 
\\ \\  \frac{x+24+x}{x(x+24)} =  \frac{1}{9} 
\\ \\9(2x+24)=x^{2} +24x
\\ \\ 18x+216=x^{2} +24x
\\ \\ x^{2}+6x-216=0
\\ \\ D=b^{2}-4ac=36+4*216 = 900
\\ \\ x= \frac{-b+/- \sqrt{D} }{2a}  =  \frac{-6+/-30}{2} 
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We can use only positive number here. So, 

for the first computer x=12 min,

 for second computer x+24=12+24= 36 min

Answer 12 min and 36 min.


7 0
3 years ago
a triangle with a base length (b) of 24 feet had an ares of 252 square feet. what is the height (h) of the triangle? (A=1/2bh)
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Answer:

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252=1/2(24)(h)

multiply 1/2 and 24

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divide ( 252/12 12/12)

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7 0
3 years ago
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