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2 years ago

I've been looking at answers for 3a+1=-3.6a(a-1) and everyone is calling a minus 1 atimes 1. why?

Mathematics

1 answer:

ExtremeBDS [4]2 years ago

3 0

It has no real solutions. that's why

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While checking the balance of your bank account, you must record a

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Step-by-step explanation:

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2 years ago

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What is the value of X?<br> A.10<br> B.7<br> C.11<br> D.4

Zinaida [17]

Answer:

the answer is c

Step-by-step explanation:

just guess lol

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3 years ago

Witch is bigger<br><br> 1/4 <br> or<br> 2/7

Kaylis [27]

Answer:

2/7

Step-by-step explanation:

this is because you can simply do the butterfly method and multiply 4 times 2 which is 8 for 2/7 and 7 times 1 for 1/4 which is 7 so 2/7 is greater than 1/4

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2 years ago

6+2x=5-7x WHAT DOES X EQUAL PLEASE ANSWER FAST

ycow [4]

Answer:

x= -1/9

Step-by-step explanation:

6+2x=5-7x

-2x. -2x

6=5-9x

-5. -5

1=-9x/-9

-1/9=x

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3 years ago

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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:

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

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

$(x^2-1)+(y^2-(-2))=16$

Now, we have that:

$h=1\\k=-2\\r=\sqrt{16}=4$

So,

Center: (1,-2)

Radius: 4 units.

Have a nice day!

Note: I have attached a picture for better understanding.

5 0

3 years ago