Music some students do homework with music playing in their headphones. (anyone come to mind? ) some researchers want to see if people can work as effectively with as without distrac-tion. the researchers will time some volunteers to see how long it takes them to complete some relatively easy crossword puz-zles. during some of the trials, the room will be quiet; during other trials in the same room, subjects will wear headphones and listen to a pandora channel.
a) design an experiment that will require a two-sample t-procedure to analyze the results.
b) design an experiment that will require a matched-pairs t-procedure to analyze the results.
c) which experiment would you consider the stronger design? why?

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)

{3 + i, 3 - i, 3, -1}

step-by-step explanation:

{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

im pretty sure its

(8,15)

step-by-step explanation: