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2 years ago

Please look at the image which includes the question ! I need help on this. I am pretty confused right now.

Mathematics

1 answer:

vlabodo [156]2 years ago

5 0

I'm guessing it's (8,9)

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Plzzz help me I am timed plz

myrzilka [38]

Answer:

The first option

8 0

3 years ago

What is the factor of x²-4x+24

DochEvi [55]

Answer:

Their are no possible factors for this expression.

Step-by-step explanation:

3 0

3 years ago

Find+the+positive+value+for+α+if+the+radius+of+the+circle+3x^2+3y-6αx+12y-3α=0+is+4

Alik [6]

Answer:

$\alpha=3$

Step-by-step explanation:

<u>Equation of a Circle</u>

A circle of radius r and centered on the point (h,k) can be expressed by the equation

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

We are given the equation of a circle as

$3x^2+3y^2-6\alpha x+12y-3\alpha=0$

Note we have corrected it by adding the square to the y. Simplify by 3

$x^2+y^2-2\alpha x+4y-\alpha=0$

Complete squares and rearrange:

$x^2-2\alpha x+y^2+4y=\alpha$

$x^2-2\alpha x+\alpha^2+y^2+4y+4=\alpha+\alpha^2+4$

$(x-\alpha)^2+(y+2)^2=r^2$

We can see that, if r=4, then

$\alpha+\alpha^2+4=16$

Or, equivalently

$\alpha^2+\alpha-12=0$

There are two solutions for $\alpha$ :

$\alpha=-4,\ \alpha=3$

Keeping the positive solution, as required:

$\boxed{\alpha=3}$

8 0

3 years ago

Element A combines with Element B at a ratio of 2:1 to make a particular substance. If you have 10 grams of element A in the sub

Marina86 [1]

If its a 2:1 ratio then 5.

5 0

2 years ago

26.45+4.79+120.02-3.20=

viva [34]

The answer to your question is = 148.06

6 0

3 years ago

Read 2 more answers