To subtract fractions, you need to obtain a common denominator. We can achieve this, in this case, by multiplying:

Simplify this:

Now we have common denominators, so we can easily just subtract the numerators, and we have the answer:

Notice that this is divisible by 2:

That's your answer!
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You need to use trigonometry, and square all of the numbers, you then add the lowest two and they should sum to the other number.
The set that this works for is the correct set.
Hope this helps x
Answer:
800
Step-by-step explanation:
you divide 712 by .89
Since BCDEF is regular, we know right away that

because the measures of all exterior angles of any regular polygon add to 360 degrees; they are all of equal measure here, so we divide 360 by 5.
For the pentagon BCIHG, the same is true, which means we have the equation

So

.
Answer:
18.97
Step-by-step explanation: