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GhostFace18595
08.04.2021 •
Mathematics
Find the area of this circle, Use 3 for a
A = 7r2
4 in
[?] in2
Enter
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Ответ:
i have attached a screenshot with the equation.
a = -5
explanation:
before we begin, remember the following:
-ve * -ve = +ve
+ve * +ve = +ve
-ve * +ve = -ve
+ve * -ve = -ve
now, for the given equation, we have:
- (5 - (a+1)) = 9 - (5 - (2a-3))
start by resolving the inner brackets, this will give:
- (5 - a - 1) = 9 - (5 - 2a + 3)
now, gather like terms in each bracket. this will give us:
- (4 - a) = 9 - (8 - 2a)
then, resolve the brackets on both sides, this will give us:
-4 + a = 9 - 8 + 2a
gather like terms:
-4 + a = 1 + 2a
subtract "a" from both sides:
-4 + a - a = 1 + 2a - a
-4 = 1 + a
finally, subtract "a" from both sides of the equation:
-4 -1 = 1 + a - 1
-5 = a
hope this : )