Find the difference and simplify the answer. 
- 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Find v ? u.v = 6i - 9j and u = -7
i + 2j
A. -18 - 42
B. (6 - 7
)i - 7j
C. -18
+ 42
D. -18
i - 42j
Mathematics
Find the product.(5s - 2)(2s3 - 2s2 + 4s - 2)
A. 10s4 - 14s3 + 12s2 - 18s + 4 B. 10s4 - 14s3 + 24s2 - 10s + 4 C. 10s4 - 14s3 + 24s2 - 18s + 4 D. 10s4 - 6s3 + 24s2 - 18s + 4
Mathematics
Let A and B be sets with cardinal numbers, n(A) = a and n(B) = b, respectively. Decide whether the statement is true or false.n(A ? B) + n(A ? B) = n(A) + n(B)
A. True B. False
Mathematics
Sketch D and g(D) from the description of D and change of variables 
x = u cos v, y = u sin v where D is the rectangle 1 ? u ? 2, 0 ? v ? 
?
A.
 ? |  |
B.
 ? |  |
C.
 ? |  |
D.
 ? |  |
Mathematics