exam Maths Puzzle Numerical Ability

solve this system of equation by graphing
1. 3x-6y=-9
2x-4y=-6

2. x+y=-6
-x+2y=6

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exam Other Question

A mayoral election race is tightly contested. In a random sample of 1,100 likely voters, 572 said that they were planning to vote for the current mayor.

Based on this sample, w 2B(3-B?)/B^2-9