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3 years ago

Expand the expression and combine like terms

Mathematics

1 answer:

____ [38]3 years ago

4 0

But what is the expression, you have to tell me so I can do it.

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5, 7, 11, 15, 21 is an infinite series. True or False

Gekata [30.6K]

Answer:

True

Step-by-step explanation:

8 0

3 years ago

a) find center of mass of a solid of constant density bounded below by the paraboloid z=x^2+y^2 and above by the plane z=4.(b) F

slava [35]

Answer: x-bar = y-bar = 0 whereas z-bar = 8/3

M= (c^2)/8 which is intern equal to 2 $\sqrt{2}$

Step-by-step explanation:

Find the area, by setting the limits as

= $4\cdot \int _0^{\frac{\pi }{2}}\int _0^2\int _{r^2}^4\:rdzdrd\theta$

$=4\cdot \int _0^{\frac{\pi }{2}}\int _0^2r\cdot \:4-r^3drd\theta$

$=4\cdot \int _0^{\frac{\pi }{2}}4d\theta$

$=8\pi$

Therefore;

Mxy= $\int _0^{2\pi }\int _0^2\int _{r^2}^4\:zrdzdrd\theta$

z-bar = 8/3

M= 8 $\pi$ dividing it into two volume gives us = 4 $\pi$

means $4\pi =\int _0^{2\pi }\int _0^{\sqrt{c}}\int _r^c\:rdzdrd\theta$

$4\pi =\left(\pi c^2-2\pi \frac{c^{\frac{3}{2}}}{3}\right)$

c=2 $\sqrt{2}$

5 0

3 years ago

Evan is on holidays in Beijing, China. He took a taxi from the airport to his hotel. It cost him 375 Chinese yuan. He went $15 A

Alekssandra [29.7K]

This question is solved using proportions, and doing this, it is found that Evan gets 5 Chinese yuans for every Australian dollar.

-----------------------------------------

Evan budgeted $60 for the taxi ride.
He went $15 over, thus, the taxi ride cost $75.
In Chinese yuans, the cost was 375.

-----------------------------------------

75 dollars are worth 375 yuans. How much yuans is a dollar worth?

1 dollar - x yuans

75 dollars - 375 yuans

Applying cross multiplication:

$75x = 375$

$x = \frac{375}{75}$

$x = 5$

Evan gets 5 Chinese yuans for every Australian dollar.

A similar question is given at brainly.com/question/23352001

4 0

3 years ago

One month ruby worked six hours more than Isaac and svetlana worked four times as much hours as ruby together they worked 126 ho

natulia [17]

R=I+6 S=4R I

I+(I+6)+4(I+6)=126

Basic algebra (I dont know how to show it) leaves you with: 6I = 90, divide both sides by 6 and I=15

4 0

3 years ago

Whats 33/40 as decimal?

natka813 [3]

To solve this, I like to use a calculator. All you have to do is divide 33 by 40. 33 divided by 40 is 0.825.

7 0

3 years ago

Read 2 more answers