Find projv u.v = k, u = 2i + 6j + 9k
A. 
k
B. 
i + 
j + 
k
C. 9k
D. 
i + 
j + 
k
Answer: C
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Solve the problem.Consider the following simplified digital photograph that has a 3 × 3 grid with four gray levels numbered from 0 to 3. It shows a letter Y in black on a light gray background.
Let A be the 3 × 3 matrix that represents this figure digitally. Find the matrix which represents the negative image of the picture represented by A.
A. 
B. 
C. 
D. 
Graph the solution of the system.
A. 
B. 
C. 
D. 
Use transformations to graph the function.y = sin x + 3
A. 
B. 
C. 
D. 
Solve. Remember to insert units when writing your answer.A 1.9-m rope is attached to a 4.6-m rope. However, when the ropes are tied, 5 cm of length is lost to form the knot. What is the length of the tied ropes?
A. 6.45 m B. 6.55 m C. 1.5 m D. 6 m