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3241004551 [841]
3 years ago
7

In a class of 34 students, 19 of them are girls.

Mathematics
1 answer:
cluponka [151]3 years ago
8 0

Answer:

55.8

Step-by-step explanation:

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Will mark brainliest
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3rd choice

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(7y^6)(2y^-4)^2

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2 years ago
Solve the equation cot 2x + cot x =3
rusak2 [61]

tan2x*cotx - 3 = 0

We know that: tan2x = sin2x/cos2x and cotx = cosx/sinx

==> sin2x/cos2x *cosx/sinx = 3

Now we know that sin2x = 2sinx*cosx

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Reduce sinx:

==> 2cos^2 x/ cos2x = 3

Now we know that cos2x = 2cos^2 x-1

==> 2cos^2 x/(2cos^2 x -1) = 3

==> 2cos^2 x = 3(2cos^2 x -1)

==> 2cos^2 x = 6cos^2 x - 3

==> -4cos^2 x= -3

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==> cosx = +-sqrt3/ 2

<span>==> x = pi/6, 5pi/6, 7pi/6, and 11pi/6</span>

3 0
3 years ago
which will have a higher effective interest rate a payday loan for $1700 that is due in 16 days with a fee of $100, or a payday
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7 0
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