exam Maths Puzzle Numerical Ability

P(5,3)

I have tried 5!and added 3!

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exam Other Question

For the angle for two vectors in the 3rd and 4th quadrant. To get the correct answer do you have to add 360. As you would add 180 if the vector was in the 2nd and 3rd quadrant. Usi Determine the best method to solve the system .Then solve for x and y.

2x+y=3x-15

x+5=4y+2x