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3 years ago

Help with 11 pls, thank you

Mathematics

1 answer:

Nady [450]3 years ago

4 0

Answer:

41°

Step-by-step explanation:

180-68=112

112-71=41

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Complete the missing places using symbols given 2 __ 4 ___8 = 0. Single choice.

marta [7]

Answer:

x , -

Step-by-step explanation:

2 x 4 = 8

8 - 8 = 0

3 0

3 years ago

Read 2 more answers

Evaluate the integral using the indicated trigonometric substitution. (use c for the constant of integration.) x^3 / sqrt x^2 +

slava [35]

$\displaystyle\int\frac{x^3}{\sqrt{x^2+49}}\,\mathrm dx$

Taking $x=7\tan\theta$ gives $\mathrm dx=7\sec^2\theta\,\mathrm d\theta$ , so that the integral becomes

$\displaystyle\int\frac{(7\tan\theta)^3}{\sqrt{(7\tan\theta)^2+49}}(7\sec^2\theta)\,\mathrm d\theta$
$=\displaystyle7^4\int\frac{\tan^3\theta\sec^3\theta}{\sqrt{49\tan^2\theta+49}}\,\mathrm d\theta$
$=\displaystyle7^3\int\frac{\tan^3\theta\sec^3\theta}{\sqrt{\tan^2\theta+1}}\,\mathrm d\theta$
$=\displaystyle7^3\int\frac{\tan^3\theta\sec^3\theta}{\sqrt{\sec^2\theta}}\,\mathrm d\theta$
$=\displaystyle7^3\int\frac{\tan^3\theta\sec^3\theta}{|\sec\theta|}\,\mathrm d\theta$

When $\sec\theta>0$ , we have

$=\displaystyle7^3\int\frac{\tan^3\theta\sec^3\theta}{\sec\theta}\,\mathrm d\theta$
$=\displaystyle7^3\int\tan^3\theta\sec^2\theta\,\mathrm d\theta$

and from here we can substitute $u=\tan\theta$ to proceed from here.

Quick note: When we set $x=7\tan\theta$ , we are implicitly enforcing $-\dfrac\pi2$ just so that the substitution can be undone later via $\theta=\tan^{-1}\dfrac x7$ . But note that over this domain, we automatically guarantee that $\sec\theta>0$ , so the absolute value bars can be dropped immediately.

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3 years ago

Plzzzzzzzz HELP!!!!!!

sveta [45]

It should be =8.32362

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3 years ago

MULTIPLE CHOICE

Dvinal [7]

Step 1) Multiply 2 by 3

5x+6 = 2x+3x+6

Step 2) Combine like terms

5x+6 = 5x+6

Step 3) Add 5x and 6 to both sides

Answer:

0 = 0

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3 years ago

BRAINLIEST AND EXTRA POINTS! ANY FAKE ANSWERS WILL BE REPORTED! 1. Write a completely simplified rational expression that repres

balandron [24]

Answer:

You did not give a amount for how much Salma has.

Step-by-step explanation:

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2 years ago