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kkurt [141]
3 years ago
5

PLEASE HELP! WILL MARK BRAINLIEST!

Mathematics
2 answers:
zzz [600]3 years ago
8 0
The answer is C. 8. Good Luck!

julsineya [31]3 years ago
7 0
First of all, you would use the FOIL method for -5(a + 3). This means to just multiply -5 to all of the values in the parenthesis. This would equal:

-5a -15 = -55

Then after, you would add 15 for both sides and get -5a = -40

Divide by -5 on both sides, you get a = 8.

Here is a visual representation: https://puu.sh/zPxLC/a16740d0ce.png

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The points J (-13,10) and K(-1,-6) are endpoints of a diameter of circle G. What is the equation of circle G?
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The correct answer is D

The equation of a circle is (x-h)^2 + (y-k)^2 = r^2

to find (h,k), you find the middle of the circle, in this scenario you do so by finding the middle of the diameter, a line that goes through the center of the circle.

To find the X value of the midpoint, add both x values together and divide by 2 and repeat for y

-13 + -1 = -14
-14/2 =-7

10+ -6 = 4
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therefore (h,k) = ( -7, 2 )

Next plug these values in the equation of a circle

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becomes

(x- (-7)) ^2 + (y-(2)) ^2 = r^2

to find r, use the distance formula to find the length of the diameter, 20, and divide by 2


plug 10 in for r and you get 100

(x+7)^2 + (y-2)^2 = 100

sorry for the late response
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