exam Maths Puzzle Numerical Ability

Solve the following 2 x 2 systems using substitutions
y= 2x +3
6x + 4y = 68

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exam Other Question

Can someone help me plot the point with coordinates (-4,3)?

Can you show me what the graph looks like?
Thanks,
Ashley
How would you use a graphing calculator to find the slope of the line containing the given points (0,0) and (2,2). I am using a TI84plus. Thanks