exam Maths Puzzle Numerical Ability

I have to solve this equation : p + 9 = 2

May I please have some help?

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exam Other Question

Which of the following assumptions is necessary to apply a nonparametric test of hypothesis using chi-square?
A) Normal population is required
B) Interval scale of measuremen
PLEASE HELP!!!!

Add

2/3x^4 - 1/3x^2y + a/2x^p

Thank you so much!