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The probability you draw all blue is 6/15 * 5/14 * 4/13= 120/2730

all white: 5/15 * 4/14 * 3/13= 60/2730

all red: 4/15 * 3/14 * 2/13= 24/2730

add them together to get probability of any one of them happening: (120+60+24)/2730

=204/2730

=34/455

x                y

216           1
27            4
8              9
1              36

x = 216 + 27 + 8 + 1 = 252 

DBC     and     CBA   form a straight line = 180 ^o

2x-255           +       x   = 180

3x = 435

x=145                                   2x-255= 35^o

s = 60 - 12t    

Shaded area is LESS than OR EQUAL to the solid line    and LESS than the dashed line

Answer A

f(sqrt(3) - sqrt(2)) = 4 + 3*sqrt(2) - 6*sqrt(3) - 3*sqrt(6)

From first equation    b^2 = 28/a^2

From third equation  c^2 = 27/a^2       Sub these into equation 2

28*27 / a⁴   =21

a = +- sqrt 6 =+-2.45

Sub this into the first equation to find b

then b = +- 2.16

then c = +-  2.12

Since   a  <  b  <  c          a = -2.45       b = -2.16       c =  +- 2.12

3b then equal 3 * -2.16 = -6.48

Sorry, can't tell you what the actual answer is, but the guest is most likely incorrect.

Realize the unlabelled angle above (2x-10)    is equal to  (4x+16) :

2x-10         +        4x+16       = 180 ^o        Now, you SHOULD be able to solve for 'x'

How many K-12 students are there?

okay thanks

1) The largest n is n = 7.

2) 3b = 56.

The polynomial factors as (x^2 + xy + y^2 + z^2)(x^2 - xy + y^2 + z^2).

Oops sorry, I wrote it wrong. 

This is the right question

Given f(x)= (4x+5)(2x+d), determine the axis of symmetry in terms of d.

Confused on what "<=" means...

Same as the other one

5 / 7   = 30/42

30/42   + ?/6 = 51/42

?/6    =   51/42 - 30/42       You can take it from here !

18 + 9d   = y    is just a horizontal line  line.....f(x) should have an 'x' in it.....

[40*(40+1)*(2*40+1)] / 6  - [20*(20+1)*(2*20+1)] / 6 =
            22,140                  -                   2,870
                                    =19,270

x+y+z=8
x+4y+6z=24 

-2x+3y+5z=2

 Hello Guest!

x+y+z=8              | subtr. 
x+4y+6z=24         * (- 2)

   3y+5z=16         | * 11     CC

-2x+3y+5z=2

-2x-8y-12z=-48     | subtr.

      11y+17z = 50  | * 3     CC

      33y+51z=150  | subtr. CC

      33y+55z=176              CC

                4z=26    | / 4      CC - CC

                 z=6.5

  33y+55*6.5=176              CC   | - 55 * 6

   33y=176-357.5   | / 33

                 y=-5.5

x+y+z=8                  | - y - z

x=8-y-z            

x=8+5.5-6.5

                  x=7

  !

7.28 + 8.06 = 15.34

15.34 - 1.58 = 13.76

13.76 / 4 = 3.44

70p + 92n = 86(n + p)

70p + 92n = 86n + 86p

16p = 6n

p/n = 6/16 = 3/8

The graph on the right is the y = 3x^2           (h, k ) = 0,0

the graph on the left is shifted 4 units left      3(x+4)²

    the graph on the left is flipped                   -3 (x+4)²

          and shifted down two units           y = -3(x+4)² -2

Thanks! This really helped a lot!!

4/5 = 16/20

16/20    +  ?/5  = 31/20

?/5 = 31/20 - 16/20

?/5 = 15/20

? = 15/20  * 5 =  75/20        =    3 3/4      or    3.75

4/5 + 3.75/5 = 31/20