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Find the value of cos A if angle A is acute and sin A = 7/10  

(A) 3/10

(B) 1/9

(C) 7/√51

(D) 51/10

(E) √51/10

The Correct Answer
Explanation

What is the sum of the 2 solutions of the equation x2 + 5x - 24 = 0?


(A) -24(B) -8(C) -5(D) 0(E) 5

Correct Answer: C

For which of the following values of a will there be exactly one real solution to the equation 2x2 - ax + 8 = 0?

(A)2 image (B) 4 (C) 4 image (D) 6 (E) 8

Correct Answer: E

Given the equation - imagex + 6y = 18, which of the following equations is perpendicular to the given equation?

(A)image (B) image (C) image (D) y = -10x + 1 (E) y = 10x + 18

Correct Answer: D

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