exam Maths Puzzle Numerical Ability

Can someone help me solve the system:
{y=3x+9
{y=x^2-2x-5.
thanks so much!

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exam Other Question

Angle A and B form a linear pair. ( they are supplementary.) find the measure of each angle if their measures are represented by the given expression.

m angle A=w,m angle B = w - 30
Given set A= {1,2,3} which of the following is true.

A. A= {xIx E N and x less than or equal to 3}
B. A is an infinite set
C. n(A) = 4
D. A is defined in "set builder" notati