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I say she's insecure about her looks

The sine increases  from  0  to 90 degrees    and from  270 to 360 degrees

The sine decreases from  90 to 270 degrees

The cosine increases from 180 to 360 degrees

The cosine decreases from 0 to 180 degrees

Sine  = 0  at   0  and 180 degrees

Cosine = 0  at   90  and 270 degrees

Thank you so very much!

hmm                                                      

Thunder makes a sound because of the constant pressure and sudden temperature change when it comes down to earth. Thunder is inside the lightening in a sense, it grows when air surrounds it. Lightning comes before thunder because the thunder needs time to reach down on earth to make the 'boom' sound.

Jeff

x 18

Notta

The angle that has its endpoints on the diameter  = 90°

So......the other two angles  sum to 90°......so we have....

x + 39  =  90      subtract 39 from both sides

x  =  51°

  51

x  6

306

the answer is 306

I'm glad to hear that Britney 

Thanks CPhill 

amazing pic girl it made my day

The series should converge to: sqrt(2)/((e - 1) (1 + e)) = ~0.221349373.....etc.

Nice, MJ....!!!

if it didnt thunder it wouldnt be thunder 

11. The equation of a parabola is given y=1/2x^2+6x+24.

What is the equation of the directrix of the parabola?

First.....find the vertex.....complete the square on x and y

y = (1/2)  [ x^2  + 12 x   + 36   + 24  - 36 ]

y = (1/2) [ (x + 6)^2 - 12  ]

y = (1/2) (x + 6)^2  - 6      the vertex is ( -6, - 6)    ....add 6 to both sides

(y + 6)  =  (1/2) (x + 6)^2      multiply both sides by 2

2(y + 6)  = ( x + 6)^2

And in the form   4p (y - k)  = (x + 6)^2

4p  = 2

p = 1/2

So......the equation of the directrix  is y = -6.5

12. The equation of the parabola is (y-1)^2=16(x+3).

What is the equation of the directrix of the parabola?

The vertex  is ( -3, 1)    and the parabola opens to the right

The form is

(y - k)^2  = 4p(x + 3)

So    4p  = 16   →  p  = 4

And the equation of the directrix  is    x  =   -7

Thanks Melody :D 

You truly are the LaTeX master

Although i believe the expression cant be

(x-(x²+4)^1/2)/2 because that means its negative, and im quite sure it cant be negative. I cant prove it properly right now, but i believe there is only one answer to the question.

Volume_cylinder  =   pi* (diameter / 2 )^2 * ( height)  =

pi * ( 12 / 2 )^2 * (30)   =

pi * ( 6)^2 * (30)  =

pi * 1080  ≈   3392.92 cubic feet

Let x be the eggs used in each batch of brownies and y be the eggs used in each batch of cookies

2x + 1y   = 7         →  2x  =  7 - 1y     (1)

2x + 2y  =  10    (2)

Sub  (1)   into (2)

7 - 1y + 2y  =  10     simplify

7 + y  = 10               subtract 7 from both sides

y = 3

Sub this into (1) to solve for x

2x  = 7 - 1(3)

2x = 4

x  = 2

So....Anna uses 2 eggs to make a batch of brownies and  3 eggs to make a batch of cookies.

4) Calculate the future value of $6,000 in 15 years if it is invested in an account with an annual percentage rate (APR) of 8% compounded monthly.

FV = PV [1 + R]^N

FV = 6,000[1 + 0.08/12]^(15*12)

FV = 6,000 x [1.00666667]^180

FV = 6,000 x        3.3069215......

FV = $19,841.53

2.  (x - 11)^2  + ( y + 9)^2  =   144

3.  The form is  4py(y - k) = (x - h)^2  where  p  =  -1.5, k = -.5, h = 3

The equation is

4(-1.5) (y + 5.5) = (x - 3)^2

-6 (y + 5.5)  = (x - 3)^2

y + 5.5  =  (-1/6)(x - 3)^2

y = (-1/6) (x - 3)^2  - 5.5

Thanks Heureka :)

Thats a lie, only reason trouble starts is because Deathrise101 says something, Death buddy grow up and start acting mature and stop blaming other people 

1+1-2+0-2+0

=2-2+0-2+0

=0+0-2+0

=0-2+0

=-2+0

=-2