Find the triple scalar product (u x v) ? w of the given vectors.u = 4i + 2j - k; v = 1i + 5j - 3k; w = 5i + 3j - 6k
A. -44
B. -52
C. -142
D. -80
Answer: D
Mathematics
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Simplify the rational expression.
A. 
B. 
C. cannot be simplified
D. 
Mathematics
Solve the problem.R and R' are similar rectangles. Suppose that the width of R is a and the width of R' is 4a. If the perimeter of R is 15 in., what is the perimeter of R' ?
A. 30 in. B. 60a in. C. 120 in. D. 60 in. E. none of these
Mathematics
Find the probability.You are dealt two cards successively (without replacement) from a shuffled deck of 52 playing cards. Find the probability that both cards are black.
A. 
B. 
C. 
D. 
Mathematics
Multiply.
A. x2 - 16
B. x2 - 16x - 6
C. x2 + 16x - 6
D. x2 - 
Mathematics