Refer to the following normal curve, with mean ? and standard deviation ?.
The standard deviation ? =
A. 12
B. 24
C. 3
D. 6
E. none of these
Answer: D
Mathematics
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Solve the inequality graphically. Express the solution in set-builder notation.
< 
A. {
x < 
}
B. {
x < 
}
C. {
x > 
}
D. {
x > 
}
Mathematics
Add or subtract as indicated.(r + 5s - 3) + (-5r + s) + (s - 2)
A. -4r + 7s - 5 B. -6r + 7s - 5 C. -5r + 5s - 5 D. -4r + 6s - 5
Mathematics
Find the greatest common factor, GCF, of the expressions.6(a + 3)2 and 18(a + 3)4
A. 18(a + 3)4 B. 6(a + 3)2 C. 18(a + 3)2 D. 108(a + 3)4
Mathematics
Evaluate the expression, if possible.81-1/2
A. - 9
B. 
C. - 
D. 
Mathematics