Which list is in order from greatest to least ?2√5,423,4.67,2152 5 , 4 2 3 , 4.67 , 21 5215,4.67,423,2√521 5 , 4.67 , 4 2 3 , 2 5423,4.67,215,2√54 2 3 , 4.67 , 21 5 , 2 54.67,423,2√5,215

Step-by-step explanation:

C

as it goes 4.66666666... forever.

A is just a rounded answer.

B would mean 4.6767676767...

and D is just truncated.

{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

you'll just earn points here

step-by-step explanation: