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3 years ago

At a dog breeder's property,

Mathematics

1 answer:

nikdorinn [45]3 years ago

6 0

45 black dogs because 2/3 of 60 is 45

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Triangle JKM with side j across from angle J, side k across from angle K, and side m across from angle M

choli [55]

The answer of this question is 883 in

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3 years ago

Which expression represents "5 less than twice x"?

Strike441 [17]

2x-5 is the expression that represents 5 less than twice x

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4 years ago

Read 2 more answers

(Find the missing able in the triangle) *angle angle similarity *

Zina [86]

Answer:

Step-by-step explanation:

Hey There!

So if you didn't know all of the angles in a triangle add up to equal 180

so to find the missing angle we subtract the given angles from 180

180-90-54=36

therefore the missing angles is 36

3 0

3 years ago

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Evaluate :5/63-(-6/21)

Mashcka [7]

Answer:

answer is $\frac{23}{63}$

Step-by-step explanation:

the equation is

$\frac{5}{63}-(-\frac{6}{21} )$

=> $\frac{5}{63}+\frac{6}{21}$

=> $\frac{5}{63}+\frac{2}{7}$ ;(divide numerator and denominator of $\frac{6}{21}$ by 3)

=> $\frac{5+2*9}{63}$

=> $\frac{23}{63}$

hope you have understood this

pls mark it as the brainliest

3 0

3 years ago

Integrate the following

enot [183]

I suppose you mean to have the entire numerator under the square root?

$\displaystyle\int_2^4\frac{\sqrt{x^2-4}}{x^2}\,\mathrm dx$

We can use a trigonometric substitution to start:

$x=2\sec t\implies\mathrm dx=2\sec t\tan t\,\mathrm dt$

Then for $x=2$ , $t=\sec^{-1}1=0$ ; for $x=4$ , $t=\sec^{-1}2=\frac\pi3$ . So the integral is equivalent to

$\displaystyle\int_0^{\pi/3}\frac{\sqrt{(2\sec t)^2-4}}{(2\sec t)^2}(2\sec t\tan t)\,\mathrm dt=\int_0^{\pi/3}\frac{\tan^2t}{\sec t}\,\mathrm dt$

We can write

$\dfrac{\tan^2t}{\sec t}=\dfrac{\frac{\sin^2t}{\cos^2t}}{\frac1{\cos t}}=\dfrac{\sin^2t}{\cos t}=\dfrac{1-\cos^2t}{\cos t}=\sec t-\cos t$

so the integral becomes

$\displaystyle\int_0^{\pi/3}(\sec t-\cos t)\,\mathrm dt=\boxed{\ln(2+\sqrt3)-\frac{\sqrt3}2}$

7 0

3 years ago