exam Maths Puzzle Numerical Ability

Problem 1
(-6)2 pie - 4 2 pie

Problem 2
-9 2pie - (-6) 2pie

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exam Other Question

which of the following is equivalent to the rational number x-2/x+4
a. x^2+6x+8/x^2+4x+4
b. x^2+6x+8/x-4
c. x^2-4/x^2+6x+8
d. x^2+4x+4/x^2+6x+8 given angle 1 and angle 2 are complementary
ray BD bisects angle ABC
Prove: m angle 2 = 45 degrees