exam Maths Puzzle Numerical Ability

I need help finding slope of line passing through (-3,3) and (-3,-3)

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exam Other Question

Please help me solve this problem. I am stumped on what to do.
Thank-you!!!

15(23-4x2)3rd power divided by(3x25) State whether the system is consistent and independent, consistent and dependent, or inconsistent: 4x+2y=8,2x+y=1