All categories

3 years ago

Factor completely...................

Mathematics

1 answer:

defon3 years ago

3 0

Answer:

Final answer is A. $9(3x+1)(3x-2)$ .

Step-by-step explanation:

Given expression is $81x^2-27x-18$ .

$81x^2-27x-18$

$=9(9x^2-3x-2)$

We can factor that by splitting middle term into two parts then do grouping as shown below:

$=9(9x^2-6x+3x-2)$

$=9(3x(3x-2)+1(3x-2))$

$=9(3x+1)(3x-2)$

Which correctly matches with choice A. $9(3x+1)(3x-2)$ .

Hence final answer is A. $9(3x+1)(3x-2)$ .

You might be interested in

PLS SOMEONE HELP MEEE

inn [45]

Answer: 20

Explanation:

6 0

3 years ago

Read 2 more answers

Helpppp someone !!! It’s due midnight tonight .

postnew [5]

Answer:

Hey there,

Let the angle ABC = x

Let the angle CBE = y

Let the angle EBD = z

We want to find x.

So, we are given the following:

x+y+z=85

z=21

And y=z

therefore, both y and z must equal 21.

21+21=42

85-42=43.

8 0

3 years ago

What is the simplest form of ^4 sqrt 81x^8y^5

lara31 [8.8K]

ANSWER

$3 {x}^{2} y \sqrt[4]{y}$

EXPLANATION

We want to simplify:

$\sqrt[4]{81 {x}^{8} {y}^{5} }$

We can split the radical sign to obtain:

$\sqrt[4]{81} \times \sqrt[4]{ {x}^{8} } \times \sqrt[4]{ {y}^{5} }$

$\sqrt[4]{81} \times \sqrt[4]{ {x}^{8} } \times \sqrt[4]{ {y}^{4} \times y}$

$\sqrt[4]{81} \times \sqrt[4]{ {x}^{8} } \times \sqrt[4]{ {y}^{4}} \times \sqrt[4]{y}$

$\sqrt[4]{ {3}^{4} } \times \sqrt[4]{ {x}^{8} } \times \sqrt[4]{ {y}^{4}} \times \sqrt[4]{y}$

Recall that:

$\sqrt[n]{ {a}^{m} } = {a}^{ \frac{m}{n} }$

${3}^{4 \times \frac{1}{4} } \times {x}^{8 \times \frac{1}{4} } \times {y}^{4 \times \frac{1}{4} }\times \sqrt[4]{y}$

$3 {x}^{2} y \sqrt[4]{y}$

6 0

4 years ago

Read 2 more answers

Aliaa is skating down a ramp. The wheels on her skateboard have diameters of 60 mm.

Dahasolnce [82]

Answer:

3770 mm.

Step-by-step explanation:

The diameter of of the wheels is 60mm, that means the radius is 30mm.

Now for one revolution of the wheels, they cover the distance of $2\pi *30mm=188.5mm.$ on the ground.

For 20 revolutions, the distance covered will be 20 times this.

Thus

$Distance\: covered =188.5*20=\boxed{3770mm}$

Which is our answer.

7 0

4 years ago

Read 2 more answers

Will give brainliest

Effectus [21]

5 x 6 = 30

The area is 30

4 0

3 years ago

Read 2 more answers