There are 4 green crayons, 6 yellow crayons and 3 blue crayons. P(green
then blue) without replacement. *

0.0769 or 7.69%

Step-by-step explanation:

Number of green crayons = 4

Number of yellow crayons = 6

Number of blue crayons = 3

Total number of crayons = 4 + 6 + 3

                                         = 13 crayons

probability to get first green crayon P₁ =

Probability to get second crayon is blue P₂ =

P = P₁ × P₂

  =

  =

  = 0.0769

Probability to get green then blue is 0.0769 or 7.69%

{x = -1/2 ,   y = -1

step-by-step explanation:

solve the following system:

{2 x + y = -2

{10 x - 3 y = -2

in the first equation, look to solve for y:

{2 x + y = -2

{10 x - 3 y = -2

subtract 2 x from both sides:

{y = -2 x - 2

{10 x - 3 y = -2

substitute y = -2 x - 2 into the second equation:

{y = -2 x - 2

{10 x - 3 (-2 x - 2) = -2

10 x - 3 (-2 x - 2) = (6 x + 6) + 10 x = 16 x + 6:

{y = -2 x - 2

{16 x + 6 = -2

in the second equation, look to solve for x:

{y = -2 x - 2

{16 x + 6 = -2

subtract 6 from both sides:

{y = -2 x - 2

{16 x = -8

divide both sides by 16:

{y = -2 x - 2

{x = -1/2

substitute x = -1/2 into the first equation:

{y = -1

{x = -1/2

collect results in alphabetical order:

answer:   {x = -1/2 ,   y = -1

%40

step-by-step explanation: