What is the center and radius of the circle with the given equation x^2 + y^2 + 14x - 12y +69 = 0
1 answer:
Answer:
Center is (7,-6)
Our radius is 4
Step-by-step explanation:
Subtract 69 to both sides
Complete the square of the x terms and y terms.
(To complete the square divide the coefficient by 2 and square it).
Add those terms to the full equation. Add 36 and 49 to the right side as well
Simplify the x and y terms into a binomial.
Set the left side equal to zero separately to find the center and take the square root of the right side to find the radius.
So our center is (-7,6)
Our radius is 4.
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Answer:
C=100
Step-by-step explanation:
5(-2a-8) < -9a + 4
Use distributive property on left side:
-10a -40 < -9a + 4
Add 40 to both sides
-10a < -9a + 44
Add 9a to both sides
-a < 44
Multiply both sides by -1 and reverse the inequality sign:
A > -44
Answer: a > -44
Answer:
50
Step-by-step explanation:
because forty is eighty percent of 50
Answer:
18
Step-by-step explanation:
1) 90 --- 100%
x --- 20%
x = 90*20/100 = 18
2)
20 % = 20/100 = 0.2
20 percent (0.2) of (*) 90 = 0.2*90 = 18
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