Im pretty sure the answer is 10. Hope this helped.
Answer:
C. 5.0*10 superscript 6
Step-by-step explanation:
i just took the test and i got it right.
If you would like to solve the system of linear equations, you can do this using the following steps:
2x - y = -1 ... y = 2x + 1
2x + y = -7 ... y = -7 - 2x
The correct result would be: y = 2x + 1, <span>2x + y = -7.</span>
