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lana66690 [7]
3 years ago
9

What is the area of a circle with the radius of 7

Mathematics
1 answer:
alukav5142 [94]3 years ago
8 0

Answer:

153.94

Step-by-step explanation:

A= r ^2

A= \pi * 7 ^2

A= 153.94

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Answer:

-2.4

Step-by-step explanation:

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5
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3 years ago
Determine the values of x when f(x)=40 for the function f(x)=2(x-3)^2-8
SpyIntel [72]

Answer:

x = 3 ± \sqrt{24}

or

x = 3 + \sqrt{24}, x = 3 - \sqrt{24}

Step-by-step explanation:

given f(x) = 2(x - 3)^2 - 8, find when f(x) = 40

So, we plug in 40 for f(x) in the 1st equation and solve for x.  (Aim to got x on its own)

40 = 2 (x - 3)^2 - 8

+ 8          + 8

-----------------------------

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/2            /2

-----------------------------

24 = (x - 3)^2

square root both sides

--------------------

\sqrt{24} = x - 3

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