exam Maths Puzzle Numerical Ability

Kim traveled a total of 10 km. in 50 minutes.
Sasha traveled 10 km. in 55 minutes.
Barry did 10km. in 60 minutes.
What is their average speeds?

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exam Other Question

Solve the system by graphing.
3x - y = 1
3x - y = 2 I can not seem to get the correct answer to this problem. I don't seem to be able to see were I keep going wrong. Please Help.

4y-4+y+24=6y+20-4y