All categories

3 years ago

What is x(3x+2)?Please give a reasonable explaination and answer.

Mathematics

2 answers:

Karo-lina-s [1.5K]3 years ago

7 0

Answer:

3x^2+2x

Step-by-step explanation:

multiply each of the two terms by x using the distributive property

Andru [333]3 years ago

6 0

Answer:

3x squared + 2x as you multiply everything in the bracket by what's on the outside of the bracket so it would be 3x multiply by x which equals 3x squared and 2 multiply x which equals 2x

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What are the surface area and volume of a spherical barrel cactus with a radius of 5 inches?

tino4ka555 [31]

$\bf \textit{surface area of a sphere}\\\\ SA=4\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r = 5 \end{cases}\implies SA=4\pi (5)^2 \\\\\\ SA=100\pi\implies SA\approx 314.16 \\\\[-0.35em] ~\dotfill\\\\ \textit{volume of a sphere}\\\\ V=\cfrac{4\pi r^3}{3}\qquad \qquad V=\cfrac{4\pi (5)^3}{3}\implies V=\cfrac{500\pi }{3}\implies V\approx 523.60$

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3 years ago

A helicopter's rotor sweeps out an area of 121 pi square

Nuetrik [128]

Answer:

<h2>22 meters.</h2>

Step-by-step explanation:

It's important to notice that the area is circular, which is defined by

$A= \pi r^{2}$

Replacing given values and solving for r, we have

$121 \pi = \ pi r^{2} \\121=r^{2}\\ r= \sqrt{121}=11$

But, the diameter is twice the radius, so

$d=2r=2(11)=22$

Therefore, the diameter is 22 meters.

6 0

4 years ago

Which of the following statements demonstrates the identity property of multiplication?

alex41 [277]

Answer:

B i think

Step-by-step explanation:

The product of 1 and any number is the number (hence why it is most likely b). But instead of it being 4, it would be -4 because multiplying a negative by a positive results in a negative.

6 0

3 years ago

Find the errors and correct the following mathematical sentences.

Sergio039 [100]

Answer:

Here is another one solved.

6 0

3 years ago

My mother is 12 years more than twice my age.after 8 years she will be 20 years less than three times my age...find my age and m

Mnenie [13.5K]

You are correct for the first part, you would be 16 and your Mom would be 44. After 8 years, you would be 24 and your mother would be 52. You solve the second part by adding 8 to 16 which equals 24. Then multiply 24 times 3 which equals 72. Lastly, subtract 20 from 72 to find your mother's new age. Which would be 52.

Hope this helps !

4 0

3 years ago