Some students log their exercise activity after school . Leah and Jules skate for exercise and Robert and Apollo run for exercise . Skating burns an average of 14 calories for each minute of exercise . Running burns an average of 18 calories for each minute of exercise .

Table for the question :

Students minutes per day

Leah 45

Roberts 17

Jules 36

Apollo 24

Calculate the Number of calories each student burn for 1 day of activity :

Leah =. 630

Jules = 504

Roberts = 306

Apollo = 432

Step-by-step explanation:

Given that:

Skating burns 14 calories per minute

Running burns 18 calories per minute

Number of calories each student burn for 1 day of activity :

SKATING ;

Leah: = 14 * 45 = 630

Jules = 14 * 36 = 504

RUNNING ;

Roberts : 18 * 17 = 306

Apollo : 18 * 24 = 432

{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

answer:

24pi or letter c