exam Maths Puzzle Numerical Ability

Find the trigonometric form of the quotient [10cis(7pi/4)]/[2cis(3pi/2)]

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exam Other Question

find the y-intercept of 6x-y=-12 THIS ONE HAS ME REALLY CONFUSED. I KNOW THE ANSWER IS SIMPLE AND I AM JUST MAKING MORE OF IT, BUT IT HAS BE WHIPPED. I HAVE TO SHOW ALL WORK TO SOLVE FOR x.

6 - x + 12 = 10x + 7