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2 years ago

Could you explain how to solve this problem? 10n = 40

Mathematics

2 answers:

kondor19780726 [428]2 years ago

8 0

Answer:

n=4

Step-by-step explanation:

n is 4 because 10(4)=40 the n represents a number and because there is nothing in between we know to multiply them, because we know that do the opposite of the question which is 40/10=4 meaning that n=4

irina1246 [14]2 years ago

7 0

Since were trying to solve for n, you have to isolate it so you would divide both sides by 10, and that will give you n = 4

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valentina_108 [34]

Answer:

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Step-by-step explanation:

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2 years ago

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If a=2, b= -1, c= -3 and d= -2 find : 1/2bc-6ac+2ab 1/4(ac)² +1/6ac

Arisa [49]

Answer:

Step-by-step explanation:

1/2bc - 6ac + 2ab

(1/2)(-1)(-3) - (6)(2)(-3) + (2)(2)(-1)

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2 + 36 - 4

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7 0

3 years ago

Electric charge is distributed over the disk x2 + y2 ≤ 16 so that the charge density at (x, y) is rho(x, y) = 2x + 2y + 2x2 + 2y

professor190 [17]

Answer:

Required total charge is $256\pi$ coulombs per square meter.

Step-by-step explanation:

Given electric charge is dristributed over the disk,

$x^2=y^2\leq 16$ so that the charge density at (x,y) is,

$\rho (x,y)=2x+2y+2x^2+2y^2$

To find total charge on the disk let Q be the total charge and $x=r\cos\theta,y=r\sin\theta$ so that,

$Q={\int\int}_Q\rho(x,y) dA$ where A is the surface of disk.

$=\int_{0}^{2\pi}\int_{0}^{4}(2x+2y+2x^2+2y^2)dA$

$=\int_{0}^{2\pi}\int_{0}^{4}(2r\cos\theta+2r\sin\theta+2r^2 \cos^{2}\theta+2r^2\sin^2\theta)rdrd\theta$

$=2\int_{0}^{2\pi}\int_{0}^{4}r^2(\cos\theta+\sin\theta)drd\theta+2\int_{0}^{2\pi}\int_{0}^{4}r^3drd\theta$

$=\frac{2}{3}\int_{0}^{2\pi}(\sin\theta+\cos\theta)\Big[r^3\Big]_{0}^{4}d\theta+2\int_{0}^{2\pi}\Big[\frac{r^4}{4}\Big]d\theta$

$=\frac{128}{3}\int_{0}^{2\pi}(\sin\theta+\cos\theta)d\theta+128\int_{0}^{2\pi}d\theta$

$=\frac{128}{3}\Big[\sin\theta-\cos\theta\Big]_{0}^{2\pi}+128\times 2\pi$

$=\frac{128}{3}\Big[\sin 2\pi-\cos 2\pi-\sin 0+\cos 0\Big]+256\pi$

$=256\pi$

Hence total charge is $256\pi$ coulombs per square meter.

3 0

3 years ago

What is 0 divided by 6

Pepsi [2]

0 / 6 is equal to 0 because anything that divides 0 will always be zero but never if the problem is 6/0

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3 years ago