Select the correct answer.
This expression represents the average cost per game, in dollars, at a bowling alley, where n represents the number of games:
3n + 7 / n
What is the average cost per game if James bowls 4 games?

A.
$3.50
B.
$2.75
C.
$4.75
D.
$15.00

.

C. $4.75

Step-by-step explanation:

3n + 7/n

3 (1) + 7/4

multiply 3*1

and divide 7/4

add 3 + 1.75

answer 4.75

a: 1/6, j: 1/4

step-by-step explanation: you are welcome

{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