Subtract and simplify.
- 
A. 
B. 
C. 
D. 
Answer: A
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Solve the problem.Find the range and the standard deviation of the following prices of backpacks: 
$10.45, $10.86, $11.99.
A. Range = $8.14; standard deviation = $2.08 B. Range = $8.14; standard deviation = $2.62 C. Range = $6.99; standard deviation = $2.43 D. Range = $6.99; standard deviation = $2.08
Solve the given inequality (a related function is graphed).-x2 + 3x ? -7x + 21 
x-intercepts: (3, 0), (7, 0)
A. (3, 7) ? (7, ?) B. (-?, 3] ? [7, ?) C. [3, 7] D. (-?, -3) ? (7, ?)
Solve each system of equations using matrices (row operations). If the system has no solution, say that it is inconsistent.
A. x = -7, y = 3, z = 14 B. x = 7, y = 3, z = 5 C. x = 7, y = 5, z = 3 D. Inconsistent
The graph of a function is given. Decide whether it is even, odd, or neither.
A. even B. odd C. neither