Algerbra 2/Trigonometry - June 2010

PART II

28 Use the discriminant to determine all values of k that would result in the equation
x2 - kx + 4 = 0 having equal roots.

29 The scores of one class on the Unit 2 mathematics test are shown in the table below.


Find the population standard deviation of these scores, to the nearest tenth.

30 Find the sum and product of the roots of the equation 5x2 + 11x - 3 = 0.

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