Fill in the blank with one of the words or phrases listed below. 
A combination of operations on variables and numbers is called a(n) 
.
A. exponent
B. addend
C. equation
D. expression
Answer: D
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Find the limit if it exists.
5x(x + 4)(x - 2)
A. -240 B. 480 C. -2400 D. -480
Use a system of linear equations in two variables to solve the problem.University Theater sold 524 tickets for a play. Tickets cost $24 per adult and $14 per senior citizen. If total receipts were $9006, how many senior citizen tickets were sold?
A. 257 senior citizen tickets B. 357 senior citizen tickets C. 267 senior citizen tickets D. 167 senior citizen tickets
Find the distance between the points, and find the midpoint of the line segment joining them.(?, 0) and (?/4, 1)
A. 
; 
B. 
; 
C. 
; 
D. 
; 
Calculate the arc length of the indicated portion of the curve r(t).r(t) = 3ti + 
j + 
k; -1? t ? 7
A. 40 B. 200 C. 150 D. 30