exam Maths Puzzle Numerical Ability

what is the perimeter of a regular hexagon whose sides are 52cm

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exam Other Question

im not sure if im doing my problems correctally here is one if them, c/-59=-7
the first set of numbers being a fraction
How would you classify and graph the following system?

y=x+4
y+x=4

Then, how would you find the solution to this system from the graph?
Thank you!