Find the value of the variable that satisfies the equation.-2x = -10x - 40
A. x = -5
B. x = - 
C. x = 
D. x = 20
Answer: A
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Solve the problem.Find a vector of magnitude 10 in the direction of v = 15i - 8k.
A. 10(15i - 8k)
B. 
(15i - 8k)
C. 10(i - k)
D. 
(15i - 8k)
Find the product. Simplify before performing the multiplication.
? 
A. 
B. 
C. 
D. 
Write the equation for the circle described.Center at (3, 8), passing through (6, 12)
A. (x + 8)2 + (y + 3)2 = 9 B. (x + 3)2 + (y + 8)2 = 25 C. (x - 8)2 + (y - 3)2 = 9 D. (x - 3)2 + (y - 8)2 = 25
Solve the problem.An arrow is fired straight up from the ground with an initial velocity of 
per second. Its height, 
in feet at any time t is given by the function 
Find the interval of time for which the height of the arrow is greater than 
A. between 
and 
sec
B. before 
sec
C. after 
sec
D. before 
sec or after 
sec