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3 years ago

PLEASE HELP! giving BRAINLIEST AND GIVE CORRECT ANSWER AND EXPLAIN!

Mathematics

1 answer:

Ghella [55]3 years ago

3 0

so the answer is 20 square centimeter.

Hope this will help u...

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What is the expression for the sum of the first n odd numbers starting 1+3+5+.....

labwork [276]

Answer:

(2n-1)

Step-by-step explanation:

The expression will be (2n-1) where n is the index of the odd number you wanna find

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3 years ago

Read 2 more answers

G(n)=3n+1 f(n)=4n-3 find g(n)+f(n) solve step by step

Misha Larkins [42]

G(n) + f(n)
3n + 1 + 4n - 3
7n - 2

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3 years ago

A hemispherical tank is filled with water and has a diameter of 6 feet. If water weighs 62.4 pounds per cubic foot, what is the

masha68 [24]

Answer:

The total weight of the water in a full tank, to the nearest pound is 3527 pounds per cubic foot

Step-by-step explanation:

Given:

Diameter of the hemispherical tank = 6 feet

Weight of water per cubic foot = 62. 4 pounds

To Find:

The total weight of the water in a full tank, to the nearest pound?

Solution:

We know that the volume of a sphere is:

$V =\frac{4}{3}\pi r^3$

where

r = is the radius

In the question we are given with diameter,

$radius = \frac{diameter}{2}$

radius = $\frac{6}{2}$

Radius = 3

We need the volume of the hemisphere

So the volume of the hemisphere will be half of the volume of teh sphere

$\frac{V}{2} = \frac{2}{3}\pi r^3$

Thus the volume of the hemisphere is

$V =\frac{2}{3} \pi r^3$

Now substituting the values

$V = \frac{2}{3} \pi(3)^3$

$V = \frac{2}{3}\pi(27)$

$V = \frac{54 \pi}{3}$

$V = \frac{169.56}{2}$

V= 56.52 cubic foot

Now, the total weight of water of:

W = 56.52 x 62.4

W= 3526.848 pounds per cubic foot

To the nearest pounds

W= 3527 pounds per cubic foot

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3 years ago

Allison is evaluating the expression -5-(-2) using integer tiles. She begins with 5 negative tiles as shown. What should Allison

mote1985 [20]

Answer:

Add 2

Step-by-step explanation:

When distributing, pay attention to the negatives both inside and outside the parentheses. Imagine a 1 directly after the second negative symbol in the equation:

-5-1(-2)

Don't subtract 1 from 5! Instead multiply -1 by -2 (you're distributing, remember?)

A negative multiplied by another negative equals a positive!

-5+2

-5+2=-3

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3 years ago

14. Divide the sum of 18/5 and −71/5 by their difference.

Naddik [55]

Answer:

14. -53/89

15. 2 29/30

Step-by-step explanation:

Sum of

18/5+(-71/5)

=18/5-71/5

= 18-71/5

= -53/5

Difference between 18/5 and -71/5

=18/5-(-71/5)

=18/5+71/5

=18+71 /5

=89/5

Sum divided by difference

-53/5÷89/5

= -53/5×5/89

= -53/89

15.

1/2+1/3+1/5+x=4

15+10+6/30+x=4

31/30+x=4

31/30-4=x

31-120/30=x

89/30=x

2 29/30=x

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3 years ago