BRAINLIEST!!! +15 POINTS!!! REAL ANSWERS ONLY!!!

Mathematics

2 answers:

kramer3 years ago

3 0

Answer:

Step-by-step explanation:

Yanka [14]3 years ago

3 0

The top one. Just get 1 to the left and plug into the quadratic formula

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Which answers are elements of the solution set of the inequality ? check all that apply

jasenka [17]

First, transpose the constants to the right side just like an ordinary equation, but leave the inequality sign as it is. That becomes

x - 72 > -96
x > -96 + 72
x > -24

Thus, just check among the choices which are greater than -24. The answers would be D and E.

4 0

4 years ago

Identify the radius and center.<br><br> x^2 + y^2 - 2x + 4y - 11 = 0

miss Akunina [59]

<h2>Hello!</h2>

The answer is:

Center: (1,-2)

Radius: 4 units.

To solve the problem, using the given formula of a circle, we need to find its standard equation form which is equal to:

$(x-h)^{2}+(y-k)^{2}=r^{2}$

Where,

"h" and "k"are the coordinates of the center of the circle and "r" is its radius.

So, we need to complete the square for both variable "x" and "y".

The given equation is:

$x^2+y^2-2x+4y-11=0$

So, solving we have:

$x^2+y^2-2x+4y=11$

$(x^2-2x+(\frac{2}{2})^{2} )+(y^2+4y+(\frac{4}{2})^{2})=11+(\frac{2}{2})^{2} +(\frac{4}{2})^{2}\\\\(x^2-2x+1)+(y^2+4y+4)=11+1+4\\\\(x^2-1)+(y^2+2)=16$