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Ksivusya [100]
3 years ago
9

Evaluat the exression when X is equal to3 X+1

Mathematics
1 answer:
Gemiola [76]3 years ago
4 0
Just substitute 3 for x, and it’s 3+1=4. Your answer is 4!
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A vertical right circular cylindrical tank has height h=8 feet high and diameter d=6 feet. It is full of kerosene weighing 50 po
Mariana [72]

Answer:

The work done to  pump all of the kerosene from the tank to an outlet is W=45238.9\: J  

Step-by-step explanation:

The work is defined by:

W=\int dFdx (1)    

The force here will be the product between the volume and the kerosene weighing, so we have :

dF=\pi R^{2}dy*50

This force will be in-lbs.

Where R is the radius (3 feet)                    

Then using (1), we have:

W=\int \pi R^{2}dy*50(8-y)  

Here 8-y is a distance at some point of the tank. Now, to get the work done from the base to the top of the tank we will need to take integral from 0 to 8 feet.

W=\int_{0}^{8} \pi 3^{2}dy*50(8-y)

W=450\pi \int_{0}^{8}dy(8-y)

W=450\pi(\int_{0}^{8} 8dy-\int_{0}^{8} ydy)

W=450\pi(8y|_{0}^{8} -\frac{y^{2}}{2}|_{0}^{8})  

W=450\pi(8*8 -\frac{8^{2}}{2})

W=450\pi(64 -\frac{64}{2})

Therefore, the work done to  pump all of the kerosene from the tank to an outlet is W=45238.9\: J  

I hope it helps you!  

6 0
3 years ago
PLEASEE HELP IM BEGGING YOU
devlian [24]

Answer: god it's hard, but i will try

6 0
3 years ago
There are 160 students in the seventh grade, and 10% are in the
Julli [10]

Answer:

16

Step-by-step explanation:

Turn 10% into a decimal, so 0.1

160 x 0.1 = 16

7 0
2 years ago
Read 2 more answers
A phone company charges a monthly fee of $35.00 and $0.10 per text message. Bridget wants to pay less than $1200.00 total for he
stiv31 [10]
I believe the answer to your question is 11650
8 0
3 years ago
Luis wants to buy a skateboard that usually sells for $79.99. All merchandise is discounted by 12%. What is the total cost of th
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Answer:  $75.14

Step-by-step explanation:

to find out how much luis is saving with the discount you do

79.99 * 0.12

and get around 9 ish dollars

after that you do sales tax and get $75.14 dollars hope this helped <3

3 0
3 years ago
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