Solve the logarithmic equation.log (x - 9) = 1 - log x
A. -10, 1
B. -10
C. 10
D. -1, 10
Answer: C
Mathematics
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Find the coordinates of the vertex for the parabola defined by the given quadratic function.f(x) = x2 + 6
A. (-6, 0) B. (0, 6) C. (0, -6) D. (6, 0)
Mathematics
Simplify the expression using the product and quotient properties of square roots. Assume that any variables represent positive real numbers.
A. x
B. x
C. x2
D. x2
Mathematics
Use the formula for the sum of the first n terms of a geometric sequence to solve.Find the sum of the first five terms of the geometric sequence: -2, -6, -18, . . . .
A. - 121 B. -26 C. - 242 D. 242
Mathematics
Use an identity to write the expression as a single trigonometric function or as a single number.sin 8x cos 8x
A. 2 sin 4x
B. 
sin 16x
C. cos 4x
D. cos 8x
Mathematics