How do I Solve 1/2-2=9 by graphing

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Landon wrote that 3−2.6=4. which statement about his answer is true?