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2 years ago

(-3) (4-5) I need help

Mathematics

2 answers:

-Dominant- [34]2 years ago

6 0

Answer:

Step-by-step explanation:

I searched it up on the web

MrRissso [65]2 years ago

5 0

Answer:

Step-by-step explanation:

(-3)×(4-5)

-3×-1

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REE PLEASE HELP ASAP!!!!!

Drupady [299]

the last one i think

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3 years ago

100 points anwser asap

natita [175]

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Step-by-step explanation:

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3 years ago

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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.

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3 years ago

Local winds are created by _____.

Natasha_Volkova [10]

The correct answer is C.

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3 years ago

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If the graph of y = lxl is translated so that the point (1, 1) is moved to (1.4), what is the equation of the new graph?

Fittoniya [83]

Answer:

y = |x| + 3.

Step-by-step explanation:

The movement of the y value from 1 to 4 is a translation of 3 units upwards.

The graph is y = |x| + 3.

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3 years ago