Ryan, jessica, and mark each solved this system of equations. all of their answers are different. find and explain the mistakes. what is the correct answer?

y = 3x + 2
6x – 2y = 10

ryan’s
i solved by adding the equations. the solution is .

y = 3x + 2 → 3x + y = 2
6x – 2y = 10 → 3x – y = 5
6x = 7
x =

6x – 2y = 10 → 6 – 2y = 10

7 – 2y = 10
–2y = –3

y = -

jesse’s
i used matrices. the solution is .

mark’s
i graphed the equations. the lines are parallel and do not intersect, so there is no solution.

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )