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QveST [7]
3 years ago
6

Which choice gives the radius of the circle represented by the equation? x squared y squared 225

Mathematics
1 answer:
myrzilka [38]3 years ago
8 0
X^2 + y^2 = 225

The radius is 15.
ANswer is C
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15c² - 5c. Factorise completely ​
KATRIN_1 [288]

Looking at the problem, what we must do to complete this question is to completely factor the expression that was provided.  The expression that was provided is 15c^2 - 5c.

The first step that we must do is to take a look at the expression and see what the two pieces of the expression have in common.  We can see that both 15c^2 and -5c have the number 5 and the variable c associated with them so we can factor out those two.

<u>Factor out 5c</u>

  • 15c^2 - 5c
  • 5c(\frac{15c^2}{5c}) - 5c(\frac{5c}{5c})
  • 5c(3c) - 5c(1)
  • 5c(3c - 1)

Now we have completely factored out the expression that was provided in the problem statement and we came to final answer of 5c(3c - 1).

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Evaluate 4k2 + 3 when k = 5
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103

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To evaluate 4k² + 3, when k = 5, which means when you sees k, put 5 in replacement

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