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2 years ago

What is up !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

timofeeve [1]2 years ago

7 0

Answer: the sky and planets

Step-by-step explanation:

the are above us

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Match the expressions to their corresponding Locations

Orlov [11]

im so stupid lol

:(((((((((((((((((((( sad INsiDE

3 0

2 years ago

Round to the nearest hundredth 7.381

Soloha48 [4]

Answer:

7.39

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

If 10 is subtracted from a number,the result is 23.Find the number.

blondinia [14]

33 is the number. So 33 subtract 10 equals 23.

3 0

2 years ago

How to solve this integration problem? the answer should be -π/12

ivann1987 [24]

$\displaystyle\int_{-1}^{-\sqrt2/2}\frac{\mathrm dy}{y\sqrt{4y^2-1}}$

Try setting $y=\dfrac12\sec t$ , so that $\mathrm dy=\dfrac12\sec t\tan t\,\mathrm dt$ . The interval then changes from $-1\le y\le-\dfrac{\sqrt2}2$ to $\dfrac{2\pi}3\le t\le \dfrac{3\pi}4$ .

Now, the integral is

$\displaystyle \int_{2\pi/3}^{3\pi/4} \frac{\dfrac12\sec t\tan t}{\dfrac12\sec t\sqrt{4\left(\dfrac12\sec t\right)^2-1}}\,\mathrm dt=\int_{2\pi/3}^{3\pi/4}\frac{\tan t}{\sqrt{\sec^2t-1}}\,\mathrm dt$

The Pythagorean identity lets you reduce the denominator:

$\sqrt{\sec^2t-1}=\sqrt{\tan^2t}=|\tan t|$

Since $\tan t$ for the given interval, you have $|\tan t|=-\tan t$ , which means the integral is equal to

$\displaystyle\int_{2\pi/3}^{3\pi/4}\frac{\tan t}{-\tan t}\,\mathrm dt=-\int_{2\pi/3}^{3\pi/4}\mathrm dt=-\dfrac\pi{12}$

8 0

3 years ago

Write an equation for the line (in slope-intercept form) that passes through the given point with the slope m. (0, -7); m = -7

Alina [70]

Answer:

y= -7x -7

Step-by-step explanation:

All line equations can be represented in the form y = mx + c where a is the gradient or slope and b is the y intercept. (letters used for m and c may vary)

You have been given the slope, = -7 which you can put into y=mx+c

y = -7x + c

The function of a line ^^ means that for any values of x, you multiply it by -7 and add -7. The given coordinates means that when x =0, y = -7. So you can plug these into y = -7x + c , -7 = -7(0) + c . Therefore c = -7

Alternatively, since the value for c is the y intercept, the coordinates immediately give you the answer c. x = 0 which means taht the line intercepts the y axis when y = -7. hence the y intercept = -7

6 0

2 years ago