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just olya [345]
2 years ago
6

Rewrite the fraction as a decimal. -82/5

Mathematics
2 answers:
harina [27]2 years ago
8 0
Rewrite the fraction

- 82/5

as a decimal.

First, express it as a mixed number.

5 goes 16 times into 82, because 16 * 5 = 80, and you have a remainder of 2. So

- 82/5

= - [ 80/5 + 2/5 ]

= - [ 16 2/5 ]

= - [ 16 + 2/5 ]

Now, multiply both numerator and denominator of that proper fraction by 20, so you get a new fraction whose denominator is a power of ten (100 in this case):

= - [ 16 + (2 * 20)/(5 * 20) ]

= - [ 16 + 40/100 ]

But.40/100 = 0.4. So it is

= - [ 16 + 0.4 ]

= - 16.4 <----- this is the answer.

I hope this helps. =)
dlinn [17]2 years ago
3 0
You can just multiply the top and the bottom by 2, to get the bottom to be 10. So you get -164/10. From here you can see that 10 goes into 164,16.4 times. 

Therefore, -82/5 = -16.4

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Now according to question, Trisha raised $38 washing 5 cars and vacuuming 4 cars.

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5x+4y=38\ \ \ \ \ equation\ 1

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So framing the above sentence in equation form, we get;

4x+2y=28\ \ \ \ \ equation\2

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