Factor the expression completely. If the polynomial is prime, state this as your answer.49x2 + 64y2
A. (7x + 8y)2
B. (7x - 8y)2
C. (7x + 8y)(7x - 8y)
D. prime
Answer: D
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Find the area of the triangle having the given measurements. Round to the nearest square unit.C = 105°, a = 1 yards, b = 5 yards
A. 1 square yards B. 10 square yards C. 2 square yards D. 5 square yards
Solve the problem.Maxwell's theory of electromagnetic waves established that electromagnetism moved through space in waves. Under certain conditions, an equation that Maxwell used to explain the motion of such waves would take the form 
where ? is the angle of incidence of the original wave, ? is the angle of incidence of the wave when reflected, A is the amplitude of the original wave, and B is the amplitude of the wave when reflected. Find the value of 
when 
-4.0px;" /> and 
Round to four decimal places.
A. -0.4789
B. 0.3492
C. -0.3872
D. 0.1661
Write a linear inequality in two variables to represent the situation.An office manager is buying used filing cabinets. Small file cabinets cost $6 each and large file cabinets cost $11 each, and the manager cannot spend more than $114 on file cabinets. Let x represent the number of small file cabinets bought and let y represent the number of large file cabinets bought.
A. 6x + 11y ? 114 B. 6x + 11y ? 114 C. 6x + 11y + 114 ? 0 D. 11x + 6y ? 114
Expand.(3x2 - 2)3
A. 27x3 - 54x2 + 36x - 8 B. (9x4 - 12x2 + 4)3 C. 81x8 + 27x6 - 54x4 + 36x2 - 8 D. 27x6 - 54x4 + 36x2 - 8