Suppose ABC is a right triangle with sides of lengths a, b, and c and right angle at C. Find the unknown side length using the Pythagorean theorem and then find the value of the indicated trigonometric function of the given angle. Rationalize the denominator if applicable.Find cos A when a = 9 and b = 7.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Use a graphing utility to find or approximate the x-intercepts of the graph of the quadratic function.y = 3x2 + 8x - 16
A. (-4, 0)
B. No x-intercepts
C. (4, 0) and 
D. (-4, 0) and 
Mathematics
Graph the line through the given point with the given slope.(2, 0), m = 
A. 
B. 
C. 
D. 
Mathematics
Add or subtract as indicated. Assume all variables represent non-negative real numbers.12
+ x
A. 
B. (36 + x)
C. 6x
D. (12 + x)
Mathematics
Simplify the radical expression. Indicate if the expression is not a real number.
A. 
B. 
C. 
D. 0
Mathematics