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Rasek [7]
1 year ago
15

-2a^2+(3a-1)(a+5)-4a(a-9)

Mathematics
1 answer:
Arisa [49]1 year ago
6 0

1) Let's simplify that

-2a²+(3a-1)(a+5)-4a(a-9)​ <em>Distribute factors</em>

<em />

-2a² +3a²+15a-a-5 -4a²+36a <em>Combine like terms</em>

<em />

-3a² +50a-5

<em />

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A sphere and a cylinder have the same radius and height. The volume of the cylinder is 11 feet cubed.
asambeis [7]

9514 1404 393

Answer:

  V = (2/3)(11)

Step-by-step explanation:

The given cylinder has a height of 2r, so its volume is ...

  V = πr²(2r) = 2πr³

The volume of a sphere is given by ...

  V = 4/3πr³

Then the ratio of the volume of the sphere to the volume of the cylinder is ...

  (4/3πr³)/(2πr³) = (4/3)/2 = 2/3

So, the volume of the sphere is 2/3 times the volume of the cylinder:

  V = (2/3)(11)

4 0
3 years ago
Read 2 more answers
If u bring 10 empty bottles to the bottle shop, the bottle shop will change 10 empty bottles to 1 drink. If u bring 100 bottles
expeople1 [14]
<span>In order to calculate this, we can set up a simple ratio. We say that 10 empty bottles : 1 drink 100 empty bottles : x drinks We cross multiply to form the equation: 10x = 100 Now, we can simply solve for x to determine the number of drinks we would get for 100 bottles. x = 10 So we will get 10 drinks if we bring 100 bottles to the bottle shop.Hope this helps. Let me know if you need additional help!</span>
4 0
3 years ago
Is the product of two irrational numbers always gonna be irrational
Papessa [141]

well, we can say that √2 and √7 are irrational numbers, they do not provide a value that can be written in a "ration" or fractional.

we can also say that √2 * √7 is √(14), which is also irrational.

However, how about √7 * √7, that's √7² or namely just 7, and that's a rational, so nope, not always.

7 0
3 years ago
5w-5w= combine like terms to simplify
ElenaW [278]

Answer:

0

Step-by-step explanation:

It may say combine, but it`s subtraction soooo it`s 0.

5 0
3 years ago
Read 2 more answers
Below you will find the question is broken down into two parts. The first is asking you to solve equations and show your work. T
Schach [20]

Step-by-step explanation:

Equation (1) is :

x+2=5

Subtract 2 from both sides,

x+2-2=5-2

x=3

Equation (2) is :

2n+5=n

Taking like terms together,

2n-n=-5

n=-5

Equation (3) is :

5(x+2)-7=3x+5

⇒5x+10-7=3x+5

taking like terms together,

5x-3x=5-10+7

⇒2x=2

x=1

Hence, x =3, n = -5 and x = 1 is the required answer.

8 0
3 years ago
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