Simplify. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Use an identity to write the expression as a single trigonometric function or as a single number.
A. sin 22° B. cos 22° C. tan 22° D. cot 22°
Mathematics
The sizes of two matrices are given. Find the size of the product AB and the size of the product BA, if the given product can be calculated.A is 4 × 4; B is 4 × 4.
A. AB is 1 × 1; BA is 1 × 1. B. AB is 8 × 4; BA is 8 × 4. C. AB is 4 × 8; BA is 4 × 8. D. AB is 4 × 4; BA is 4 × 4.
Mathematics
Write the matrix equation as a system of equations and solve the system.
= 
A. {(3, 2)} B. {(-3, -2)} C. {(2, 3)} D. {(-2, -3)}
Mathematics
Solve the quadratic equation by completing the square.x2 + 5x - 2 = 0
A. -5 ± 
B. 
C. 
D. 
Mathematics