Algerbra 2/Trigonometry - June 2010

**PART II**

28 Use the discriminant to determine all values of k that
would result in the equation

x^{2 }- 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 5x^{2}
+ 11x - 3 = 0.

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