exam Maths Puzzle Numerical Ability

can you pleaase assist me with the following problems.

determin wether the system has one solution, no solution or infinitely many solution.

y=-x+2
3x+37=6

y=2/3x
2x-y

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exam Other Question

Assume that y varies directly as x. If y =4 when x =1/2, find y when x =2 Hi. Could you please help me with this problem? The problem is "find the foci for the hyperbola 2x to the second power - 4y to the second power = 36.
Please help. Thank you!