What is the solution to the system of equations? use the linear combination method.

{3x+y=3

{2x+y=7

enter your answer

(-4,15)

Step-by-step explanation:

Personally I think this works better with substitution, but I'll do it your way.

3x + y = 3

2x + y = 7               Subtract these two equations

x = - 4                      3 - 7 = - 4

3x + y = 3                 Substitute - 4 for x  

3(-4) + y = 3             Combine

-12 + y = 3                Add 12 to both sides

-12 + 12 + y = 3+12  

y = 15

Check

2x + y = 7

2*-4 + 15 = 7

- 8 + 15 = 7

7 = 7

It checks.

the answer will be

10.416 meters per second

step-by-step explanation:

distance=1 00 meters

time= 9.6 seconds in decimal form or 9 3/5 as a mixed number

average speed= 100/9.6

=10.416 meters per second or 10 52/125 as a mixed number.