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V125BC [204]
3 years ago
13

Please help me now! (For the first and the second.)

Mathematics
2 answers:
lianna [129]3 years ago
8 0

Answer:

the 1st 1 is commutative property of addition

the 2nd 1 is associative property of addition

Step-by-step explanation:

Lady bird [3.3K]3 years ago
5 0

Answer:

the 1st 1 is commutative property of addition

the 2nd 1 is associative property of addition

Step-by-step explanation:

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kap26 [50]

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Step-by-step explanation:

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4 0
3 years ago
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Please help this is almost due soon!
PolarNik [594]

Answer:

6\pi

Step-by-step explanation:

The area of the circumference of a circle is:

C=2\pi r

We know that r is 8, so we can plug that into the formula.

However, there's a problem.  We only want 3pi/4 of the circumference, not the entire circle's circumference.  Therefore, we have to divide by part/whole.  In this case, the part is 3pi/4, and the whole is 2pi (the entire circle is 2pi radians).

C = (\frac{3\pi/4}{2\pi})*(2\pi *8)\\C = (\frac{3}{8})(16\pi)\\C = \frac{48\pi }{8} \\C = 6\pi

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3^2 + 10^2 = 109

square root of 109 = 10.4403065089

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3 years ago
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