exam Maths Puzzle Numerical Ability

Solve the following system of linear inequalities by graphing.
3x + 4y < 12
x + 3y < 6
x > 0
y > 0

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exam Other Question

please help! Thanks
Factor completely:
4x2 – 36y2
I need to check this answer...In a parallelogram, the ratio of a side to its altitude is 2:1. If the Area is 800sq', find the altitude. Would it be 20'?