exam Maths Puzzle Numerical Ability

solve the following equation for x

2x^2-4t+4=6

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exam Other Question

Convert 0.32 to a percent. This problem I dont even know how you could graph it. I need help.
The problem goes like this: If x and y are integers, find the domain of { (x,y) : |y|= x and x_<4} graph the relation. Is it a function?