Find a ? b.a = 5i + 4j, b = -5i + 3j
A. 
B. 37
C. -13
D. 
Answer: C
Mathematics
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Find the angle between u and v in radians.u = -6i + 9j - 6k, v = 9i + 10j - 10k
A. 1.57 B. 0.48 C. 1.35 D. 1.09
Mathematics
Multiply.(2.4x - 5y)(3.2x + 6y)
A. 7.68x2 - 1.6xy - 30y2 B. 7.68x2 - 30.4xy - 30y2 C. 7.68x - 1.6xy - 30y D. 7.68x2 - 30y2
Mathematics
Rewrite the following as indicated.
(Write as a percent.)
A. 80% B. 8% C. 160% D. 800%
Mathematics
Graph the parabola, including its vertex, focus, and directrix.(x - 2)2 = 4(y + 5)
A. vertex: (2, -5); focus (2, -6); directrix y = -4
B. vertex: (2, -5); focus (2, -7); directrix y = -3
C. vertex: (2, -5); focus (2, -3); directrix y = -7
D. vertex: (2, -5); focus (2, -4); directrix y = -6
Mathematics