Solve the problem.When three parallel lines are crossed by two or more lines (transversals), the lengths of corresponding segments are proportional (see the following figure).
If a is 9 cm when b is 4 cm, find d when c is 6 cm.
A. 
cm
B. 24 cm
C. 
cm
D. 9 cm
Answer: A
Mathematics
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Provide an appropriate response.If the series 
is integrated twice term by term, for what value(s) of x does the new series converge?
A. -2 < x ? 0 B. -2 ? x ? 0 C. -2 < x < 0 D. -2 ? x < 0
Mathematics
Subtract the fractions. Write the answer in lowest terms.
A. 
B. 
C. 
D. 
Mathematics
If possible, simplify the expression. If any variables exist, assume that they are positive.20
- 3
A. 11
B. -11
C. 17
D. Not possible
Mathematics
Write the expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression.cos2 15° - sin2 15°
A. 
B. 
C. - 
D. - 
Mathematics