exam Maths Puzzle Numerical Ability

determine whether each relation is a function
y=3x+2y

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exam Other Question

Solve the system by addition.

2x + 4y = 3
4x - 2y = 1 A jet leaves the Charlotte, North Carolina, airport traveling at an average rate of 546km/h. Another jet leaves the airport one half hour later traveling at 744km/h in the same direction. How long will the second jet take to ovretake the first?