Find the magnitude and direction angle (to the nearest tenth) for each vector. Give the measure of the direction angle as an angle in [0,360°].
A. 100; 270°
B. 10; 180°
C. 10; 270°
D. 10; 90°
Answer: C
Mathematics
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Factor by grouping.5y - 35 + xy - 7x
A. (x - 7)(y + 5) B. (y - 7)(5 + x) C. (x - 7)(5y + x) D. (y - 7x)(5 + x)
Mathematics
Simplify the expression. Assume that all variables are positive.
-1/2
A. 
B. 
C. 
D. 
Mathematics
Solve the equation.
a = 0
A. {-16} B. {1} C. {0} D. {16}
Mathematics
Solve.
+ 16 = 0
A. No solution B. -16, 16 C. 261 D. -4, 4
Mathematics