exam Maths Puzzle Numerical Ability

angle 11=4x, and angle 12=2x-6 what is the measuement of angle 11 and angle 12

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exam Other Question

Margaret Morris just correctly computed a standard deviation of 6.0 from a sample of 50 observations. What is the variance of Margaret�s sample? find the vertex and intercept coordinates of the following.

y=x^2-5x-4