Evaluate the radical expressions or indicate that the root is not a real number.-
A. 2
B. -2
C. -16
D. Not a real number
Answer: B
Mathematics
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Use the given triangles to evaluate the expression. Rationalize all denominators. 
cos 45°
A. 
B. 
C. 
D. 
Mathematics
Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given.a = 2; r = 5?
A. a5 = 6250?5, an = 2 ? 5n?n B. a5 = 1250?, an = 2 ? 5n-1? C. a5 = 2 + 20?, an = 2 + 5?(n-1) D. a5 = 1250?4, an = 2 ? 5n-1?n-1
Mathematics
Decide whether the equation defines y as a function of x.y = x2 - 5
A. function B. not a function
Mathematics
Solve by the substitution method.9x + 9y = 365x - 5y = 20
A. {(4, 0)} B. {(x, y)|5x - 5y = 20} C. ? D. {(3, 1)}
Mathematics