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dmitriy555 [2]
3 years ago
7

Determine whether each statement is always, sometimes, or never true. explain your reasoning. A. |x|=|-x| _________ B. |x|=-|x|

_______ C. |-x|=-|x| _______
Mathematics
1 answer:
Dvinal [7]3 years ago
3 0
A. |-x|=|x| \Rightarrow |x|=|-x| always true

B. |x|\geq0 \quad \forall_{x\in \mathbb{R}} so |x|=-|x| is never true

C. same as B




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What is x, if the volume of the cylinder is 768pi rcm3?
AVprozaik [17]

let's recall Cavalieri's Principle, <u>solids with equal altitudes and cross-sectional areas at each height have the same volume</u>, so even though this cylinder is slanted with a height = x and a radius = 8, the cross-sectional areas from the bottom to top are the same thickness and thus the same area, so its volume will be the same as a cylinder with the same height and radius that is not slanted.

\bf \textit{volume of a cylinder}\\\\ V=\pi r^2 h~~ \begin{cases} r=radius\\ h=height\\ \cline{1-1} r=8\\ h=x\\ V=768\pi \end{cases}\implies 768\pi =\pi (8)^2(x)\implies 768\pi =64\pi x \\\\\\ \cfrac{768\pi }{64\pi }=x\implies 12=x

5 0
3 years ago
Mia is planting a flower garden.The table shows the type of flower bulbs planter.What is the ratio of daisy bulbs to total bulbs
photoshop1234 [79]

Answer:

my answer is c

Step-by-step explanation:

7 0
3 years ago
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fredd [130]
Hey there! :D

We are basically trying to find fractions that equal each other. 

3/12= 1/4  4/16= 1/4 

The first option applies. 

5/8= 5/8 (simplest form) 8/15= 8/15 (simplest form)

The second does not apply. 

1/6= 1/6 (simplest form) 5/30= 1/6 

The third option does apply. 

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The fourth option does apply. 

The first, third, and fourth option are the answers. 

I hope this helps!
~kaikers 
7 0
3 years ago
Read 2 more answers
What is the product of (x − 7)(2x² – 5x<br> -<br> 3<br> + 3)?
butalik [34]

Answer:

2x³-5x-14x²+35

Step-by-step explanation:

this is the simplified version/answer

3 0
2 years ago
*IGNORE THE ANSWERS*<br> This is 2nd grade math. I forgot how to solve these equations. Help:)
Mazyrski [523]

Answer:

a. 14

b. 7

Step-by-step explanation:

a. First we must add all the animals together,

Total Animals:

Birds: 6

Fish: 5

Mammals: 11

Reptiles: 3

Therefore our equation is:

6 + 5 + 11 +3 = 25.

Now, we must subtract by the number of mammals:

25 - 11 = 14

So our answer for a. is 14!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

b. So for this problem we must compute mammals + fish and than birds + reptiles. After we figure that out we must subtract them!

Mammals + Fish =

11 + 5 =

16

Next,

Birds + Reptiles =

6 + 3 =

9

Now, let us subtract them,

16 - 9 =

7

So our answer for b. is 7 more animals!

3 0
3 years ago
Read 2 more answers
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