exam Maths Puzzle Numerical Ability

graph the following system of equations

{x+2y=-8
3x+y=1

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exam Other Question

Tutor can you walk me throught this problem...please..thank you.

Find the distance between the pair of points. Give an exact answer and where appropriate an approximation to three decimal points.

(-4,-7) and (-1,3) Over all real numbers x, what is the maximum value
of 4 sin 3x ?