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Jet001 [13]
3 years ago
7

Use completing the square to solve this quadratic equation.

Mathematics
1 answer:
just olya [345]3 years ago
5 0
B and D is correct :))
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What is the equation of the circle with center (5,-4) and containing the points (5,-2)
gtnhenbr [62]

Answer:

The equation of a circle is (x-5)^2+(y+4)^2=4 .

Step-by-step explanation:

-The equation of a circle is:

(x-h)^2+(y-k)^2=r^2 (where center is (h,k), the point (x_{1},y_{1}) and the radius known as r).

-Use the center (5,-4) and the point (5,-2) for the equation:

(5-5)^2+(-2+4)^2=r^2

-Solve the equation:

(5-5)^2+(-2+4)^2=r^2

0 + (-2)^2=r^2

4 = r^2

\sqrt{4} = \sqrt{r^2}

2 = r

-After you found the radius, use the center (5, -4)  and radius 2 to get the equation of a circle:

(x-5)^2+(y+4)^2=2^2

-Then, after you have the equation, the radius needs to simplified by the exponent:

(x-5)^2+(y+4)^2=4

3 0
3 years ago
Question number four pls help I will mark brainiest​
RideAnS [48]
I am not really sure but I think the answer is B
3 0
2 years ago
Please I need some help on this
ivann1987 [24]

It wouldbe D.) because you would do

12-4=x

x would be the number of adults

you would solve for x and get 8 so you would have to solve so it would be D.)

3 0
2 years ago
Read 2 more answers
What is the measure of angel A?
Rudiy27

Answer:

12.68°

Step-by-step explanation:

We know all three sides (18, 80, 82), but we only need two: 18, and 82. Why? What we do here is find the arcsin of the first leg divided by the hypotenuse.

arcsin(18/82)

<em>18/82 is the same as 9/41, which equals 0.21951 repeating (all 5 digits after the decimal are repeating, by the way).</em>

arcsin(0.21951)

<em>What you see above this statement equals 0.22131 radians.</em>

0.22131 rad

<em>To convert this to degrees, multiply by 57.2957795.</em>

0.22131 * 57.2957795

<em>0.22131 times 57.2957795 is 12.680128961145.</em>

12.680128961145°

<em>The directions say the final answer has to be two decimal places. So this becomes 12.68 (0 is less than 5, so round down).</em>

12.68°

Angle A is 12.68°.

6 0
2 years ago
See image for question.
klio [65]

Answer:

  • See below

Step-by-step explanation:

We get possible sums from 1 + 1 = 2 to 6 + 6 = 12 when we toss two dices together. Total ways 6*6 = 36

a.

<u>Prime numbers:</u>

  • 2, 3, 5, 7, 11 - total 5 outcomes with 15 ways (1+1, 1+2, 1+4, 1+6,2+1, 2+3, 2+5, 3+2, 3+4, 4+1, 4+3, 5+2, 5+6, 6+1, 6+5)
  • P(prime number) = 15/36

b.

<u>Perfect squares:</u>

  • 4, 9 - total 2 outcomes with 3 ways for 4 (1 +3, 2+2, 3+1) and 4 ways for 9 (3+6, 4+5, 5+4,6+3)
  • P(perfect square) = (3 + 4)/36 = 7/36

c.

<u>Perfect cube:</u>

  • 8 - one outcome with 5 ways (2+6,3+5,4+4,5+3,6+2)
  • P(perfect cube) = 5/36
8 0
3 years ago
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