Rationalize the denominator. Assume all variables represent positive numbers.
A. 
(
- 1)
B. 
(
+ 1)
C. 
(
+ 1)
D. 
(
+ 1)
Answer: C
Mathematics
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Evaluate the expression by first changing the form. Verify the answer by use of a calculator. sin 100° cos 40° - cos 100° sin 40°
A. 
B. 
C. 
D. 
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Find the ordered pair for the vertex.f(x) = 
(x + 17)2 + 6
A. (6, 0) B. (-17, 17) C. (0, 6) D. (-17, 6)
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Write an algebraic expression, using x as the variable.1.9 less than some number
A. x + 1.9 B. 1.9 - x C. 1.9x D. x - 1.9
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Graph the compound inequality.2x - y > 4 and x ? 4
A. 
B. 
C. 
D. 
Mathematics