Express the vector as a product of its length and direction.-9i + 9j + 9k
A. 9( -i + j + k)
B. 
C. 9
D. 9
Answer: C
Mathematics
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Find the angle between vectors v and w. Round the answer to the nearest tenth of a degree.v = 
, w = 
A. 34.5° B. 145.5° C. 55.5° D. 101.9°
Mathematics
Suppose ABC is a right triangle with sides of lengths a, b, and c and right angle at C. Find the unknown side length using the Pythagorean theorem and then find the value of the indicated trigonometric function of the given angle. Rationalize the denominator if applicable.Find sin A when b = 33 and c = 55
A. 
B. 
C. 
D. 
Mathematics
Use the given substitution to solve the equation.x4 - 3x2 + 2 = 0, u = x2
A. ±1, ±2
B. 1, 2
C. ±1, ± 
D. 2, 3
Mathematics
Simplify, if possible.
A. 
B. 
C. 
D. 
Mathematics