-18 + 10 = -8
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For your first question: find a common denominator first
for your second question :whats 360 divided by 30??
Remember
(a-b)(a+b)=a²-b²
we can rewrite what we were given into
definitely rational
Thank, this is same issue
The answer is f=12.56 because you take 7*3.14 and get 21.98 and then you take 3*3.14 and get 9.42 then you take 21.98-9.42 and get 12.56