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pychu [463]
3 years ago
13

If you good at math help please!

Mathematics
2 answers:
olganol [36]3 years ago
6 0

Answer:

3 because your domain should not repeat 2 tims.

olchik [2.2K]3 years ago
5 0

Answer:

3 because your domain should not repeat

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Find sinx given cos2x=5/9
Diano4ka-milaya [45]

Answer:

sinx = √2/3

Step-by-step explanation:

cos2x = 1-2sin²x

5/9 = 1-2sin²x

2sin²x =1-5/9

2sin²x = 4/9

sin²x = (4/9)/2

sin²x = (4/9)*(1/2)

sin²x = 2/9

sinx = √2/3

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IrinaK [193]
Hi There! :)

<span>Who procrastinates to study

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3 years ago
Help meeeeeeeeeeeeeeee pleaseee!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
konstantin123 [22]

For the equation  F(x) = ax² + bx + c we have:

  • maximum value if a<0
  • minimum value if a>0

F(x) = -3x² + 18x + 3    ⇒  a = -3, b = 18

a < 0    ⇒   the function has a maximum value

Quadratic function has the maximum value (or minimum) at vertex of its parabola.

The maximum value is k at x=h where:  h=\dfrac{-b}{2a}  and  k = F(h)

h=\dfrac{-18}{2\cdot(-3)}=3\\\\F(3)=-3\cdot3^2+18\cdot3+3=-27+54+3=30

Therefore:

<h3> The function has a maximum value of 30 at x = 3</h3>

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1 year ago
What is the square root of negative four
Dmitry [639]
The square root of negative four is 2
3 0
3 years ago
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