Triangle ABC is a right triangle with sides of lengths a, b, and c and a right angle at C. Find the indicated trigonometric function value of A. Rationalize denominators containing radicals.a = 3, b = 
; find cos A.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Simplify the expression. Assume that all variables represent non-negative real numbers.5
- 
A. 5(x -1)
B. (x -1)
C. (5x -1)
D. 5x
- 1
Mathematics
Decide whether the statement is true or false.If the numerator and the denominator of a fraction are different prime numbers, then the fraction is always in lowest terms.
A. False B. True
Mathematics
Write the equation of the line using the information given about its graph.Slope - 
, y-intercept 5
A. y = 
x - 5
B. y = - 
x + 5
C. y = - 
x - 5
D. y = 
x + 5
Mathematics
Solve the inequality and graph the solution set.
? 12
A. (-?, 16]
B. [-8, 16]
C. (-?, -8] ? [16, ?)
D. (-?, -8]
Mathematics