All categories

2 years ago

Determine the factors of the expression x^2 - 9

Mathematics

1 answer:

Anuta_ua [19.1K]2 years ago

5 0

Answer:

Step-by-step explanation:

The answer is B.

Use the sum-product pattern

2+3−3−9

Common factor from the two pairs

2+3−3−9x2+3x−3x−9

(+3)−3(+3)

Rewrite in factored form

(+3)−3(+3)

Solution:

(−3)(+3)

‘Hope it Helps!

You might be interested in

Match each equation with the appropriate type of factoring.

Ugo [173]

I’m not sure what the answer is but I hope someone can help you

5 0

3 years ago

If sinA =3/5 and A+B =90 find cosB

-Dominant- [34]

$A+B=90^o\to B=90^o-A\\\\\cos B=\cos(90^o-A)=\cos90^o\cos A+\sin90^o\sin A\\\\=\cos A+1\cdot\dfrac{3}{5}=0+\dfrac{3}{5}=\dfrac{3}{5}\\\\\boxed{\cos B=\dfrac{3}{5}}$

$Used:\\\\\cos(x+y)=\cos x\cos y+\sin x\sin y\\\\\cos90^o=0,\ sin90^o=1$

Other method:

Look at the picture.

$\sin\theta=\dfrac{opposite}{hypotenuse}\\\\\sin A=\dfrac{3}{5}\to opposite=3\ and\ hypotenuse=5$

$\cos\theta=\dfrac{adjacent}{hypotenuse}\\\\adjacent=3\ and\ hypotenuse=5\to\cos B=\dfrac{3}{5}$

8 0

3 years ago

PLEASE HELP WILL GIVE U BRAINLIEST TYYY

Alecsey [184]

Answer: b(-2, 2) c(4,2) d (-6,7)

Step-by-step explanation:

The formula for reflecting over x axis is (x,y) - > (x,-y)

the current points are

-2,-2

4, -2

-6, -7

which turn into -2, 2

4, 2

-6,7

8 0

2 years ago

URGENT

IgorLugansk [536]

I would say the answer is E. The coach cannot select those he observes. the reason being is because all people can run a different time due to the age of the person, not saying that they have a limit but the question leaves out how fit the player is. to put in words a athletic person on the average could run about 4-5 laps depending on how far each lap is. Hope that helps

5 0

4 years ago

Which is not an equation of the line that passes through the points (1, 1) and (5, 5)?

soldi70 [24.7K]

I personally think it’s the first one

8 0

3 years ago