Replace the ? with the inequality symbol <, >, or =.|-21| ? |-9|
A. <
B. >
C. =
Answer: B
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Estimate an answer to the problem.An advertisement states that television sets are on sale at B&G Electronics. The sale prices are: 
set, $147.99; 
set, $201.95; 
set, $231.99; 27-inch set, $299.97; 
set, $502.97. Estimate the approximate number of 
style="vertical-align: -4.0px;" /> sets that can be bought for $2037. A. 15 B. 13 C. 8 D. 10
Solve the equation.
- 
= 1
A. 
B. ?
C. 
D. 
Perform the operation. Write the answer as a mixed number.7 - 2
A. 5
B. -5
C. 4
D. 4
Determine the x values that cause the function to be (a) zero, (b) undefined, (c) positive, and (d) negative.f(x) = 
A. (a) 
, (b) (-?, -8), (c) 
? (6, ?), (d) 
B. (a) {-8}, (b) 
? (-?, -8) , (c) 
, (d) 
? (6, ?)
C. (a) 
, (b) (-?, -8), (c) 
, (d) 
? (6, ?)
D. (a) {-8}, (b) 
? (-?, -8) , (c) 
? (6, ?), (d) 