Add or subtract. Simplify by combining like radical terms, if possible. Assume all variables and radicands represent positive real numbers.11 
- 3 
A. 8 
B. 11 
- 3 
C. 2 
D. -2 
Answer: C
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Express the vector as a product of its length and direction.2j + 
k
A. 
B. 
C. 
D. 
(j + k)
Write an algebraic equation and use it to solve the problem.City A experienced 18 armed robberies less than twice that of City B. In the two cities combined, 138 armed robberies occurred. How many armed robberies occurred in City A and in City B?
A. City A: 60 armed robberies; City B: 78 armed robberies B. City A: 86 armed robberies; City B: 52 armed robberies C. City A: 34 armed robberies; City B: 104 armed robberies D. City A: 62 armed robberies; City B: 40 armed robberies
Answer the question.Consider the numbers 1, 
, -24, 0, 
, 
, 
. Which are real numbers?
A. 1, -24, 0, 
, 
B. 1, 
, -24, 0, 
, 
C. 1, -24, 0, 
, 
D. 1, -24, 0, 
Solve the problem.The height, h, in feet, of the path of a ball thrown from an initial height of 64 feet can be approximated by the quadratic formula 
where t is the number of seconds after the ball was thrown. (a) How long does it take for the ball to reach its maximum height? (b) How high will the ball reach?
A. (a) 2
sec
(b) 128 ft
B. (a) 2 sec
(b) 224 ft
C. (a) 
sec
(b) 128 ft
D. (a) 3 sec
(b) 256 ft