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3 years ago

I need to know what x is.

Mathematics

1 answer:

alukav5142 [94]3 years ago

3 0

Answer:

x=5

Step-by-step explanation:

17x-3+17x+8=175

34x+5=175

x=170/34

x=5

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fiasKO [112]

Answer:

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3 years ago

A cylindrical can, open at the top, is to hold 840 cm3 of liquid. Find the height and radius that minimize the amount of materia

ycow [4]

Answer:

the radius of the base is equal to $x=2\sqrt[3]{\frac{105}{\pi } }$

And the height is equal to:

$y=\frac{840}{\pi(2\sqrt[3]{\frac{105}{\pi}})^{2} }$

Step-by-step explanation:

We write the volume function

$f(x,y)=840=\pi x^{2} y$ where x is the radius of the base and y is the height of the cylinder

$y=\frac{840}{\pi x^{2} }$

The surface of a cylinder is given by

$S(x)=\pi x^{2} +2\pi xy=\pi x^{2} +\frac{1680}{x}$ on the interval from 0 to infinity

We now determine the critical values by differentiating and making the equation equal to 0

$f'(x)=2\pi*x- \frac{1680}{x^{2}} =\frac{2\pi x^{3}-1680}{x^{2} } =0$

This equation have 2 complex solutions and one real solution

$x=2\sqrt[3]{\frac{105}{\pi } }$

For x=0 and infinity the equation goes to infinity also so the radius of the base is equal to $x=2\sqrt[3]{\frac{105}{\pi } }$

And the height is equal to:

$y=\frac{840}{\pi (2\sqrt[3]{\frac{105}{\pi } })^{2} }$

$y=\frac{840}{\pi(2\sqrt[3]{\frac{105}{\pi}})^{2} }$

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3 years ago

How do i do 2x8 and don’t just tell me the answer i need someone to explain pls

Sonja [21]

Answer:

Step-by-step explanation:

2 x 8 is just another way of saying what would 8 + 8 be

for example, 5x5 would just 25 but 5+5+5+5+5 would also be 25

Hope this helps, sorry im not a good teacher:)

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3 years ago

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Sholpan [36]

Answer:

16 carrots per square foot

Step-by-step explanation:

since you want to find the unit rate you must take the 5 square feet to make it 1. Therefore you must divide the 5,but what you do to 1 side you have to do to another so you also have to divide 80 by 5 giving you a ratio of 16:1. Showing that there are 16 carrots per square foot.

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3 years ago

Nigel has 3/4 of a chocolate candy bar that he wants to share equally among his friends Cameron, Devin, and Tyrek. How much will

Andrei [34K]

Answer:

3/4 divided 4=16 or 0.1875

Step-by-step explanation:

3/4 divided by 4 is easy all you would do is multiply the bottom number by what you are trying to divide which is 4 so you do 4x4 which is 16

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4 years ago