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2 years ago

Is it ok if you can just give me a quick answer?

Mathematics

2 answers:

White raven [17]2 years ago

5 0

I’m honestly really sorry I don’t Know the answer! I hope someone can answer your questions! SORRY!

Andrews [41]2 years ago

4 0

Hi! if i were u i would go w A. im not really all that sure abt this answer but if i had to guess on it i would choose that :)

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Evaluate the expression 2/3x - 12 if x = 18 ANSWER THIS PLEASE AND I WILL GIVE BRAINLEST BTW THE 2/3 IS A FRACTION SO 2 OVER 3 I

horrorfan [7]

Answer:

I think the answer is 0.

Step-by-step explanation:

To evaluate an expression, you need to substitute the number(18) into the equation:

2/3(18)-12

=12-12

I hope this helps!

6 0

3 years ago

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PLS HELP WITH THIS ILL GIVE BRAINLIST

VLD [36.1K]

Answer: F, D, B

Step-by-step explanation:

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2 years ago

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[25 POINTS] A cylinder has a volume of 400π cm3. Find the dimensions that minimize its surface area.

miss Akunina [59]

Answer:

r = 5.848cm, h = 11.696cm

Step-by-step explanation:

Surface area: $SA=2\pi rh+2\pi r^2$

Volume: $V=\pi r^2h$

Therefore, the height of a cylinder given its volume would be $h=\frac{V}{\pi r^2}$ , thus:

$SA=2\pi r(\frac{V}{\pi r^2})+2\pi r^2\\\\SA=\frac{2V}{r}+2\pi r^2\\\\SA=\frac{2(400\pi)}{r}+2\pi r^2\\\\SA=\frac{800\pi}{r}+2\pi r^2$

We now find the derivative of the surface area of the cylinder with respect to its radius and set it equal to 0, solving for the radius:

$\frac{d(SA)}{dr}=-\frac{800\pi}{r^2}+4\pi r$

$0=-\frac{800}{r^2}+4\pi r$

$0=800\pi+4\pi r^3$

$-800\pi=4\pi r^3$

$-200=r^3$

$r\approx5.848$

If $0If [tex]r>5.848$ , then the surface area of the cylinder increases

Therefore, the surface area is minimized when the radius is $r=5.848cm$ , making the minimum height $h=\frac{V}{\pi r^2}=\frac{400\pi}{\pi(5.848)^2}\approx11.696cm$ .

In conclusion, the 2nd option is correct.

3 0

2 years ago

Heyy! i’ll give brainliest please help

almond37 [142]

Answer:

d. Atlantic Ocean

8 0

2 years ago

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Form three equations starting with x=1/2

ollegr [7]

Answer:

x + 3 = 7/2

100x = 50

16/x = 24

Step-by-step explanation:

The value of x is 1/2 in the three equations.

The variable x is in the left side of the equations.

7 0

2 years ago

Is it ok if you can just give me a quick answer?​

Is it ok if you can just give me a quick answer?