Add or subtract. Then simplify. If a denominator has two or more factors (other than monomials), leave it in factored form. Express the answer using the denominator of the first fraction when applicable.
- 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Rationalize the denominator. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Mathematics
Write a word name for the number in the sentence.Scientists were predicting the demise of the space colony as the population approached 600,040,000.
A. Six hundred million, forty thousand B. Six hundred billion, forty million C. Six hundred forty million D. Six hundred million, forty hundred
Mathematics
Evaluate the expression.8x, if x = 4.9
A. 12.9
B. 
C. 39.2
D. 3.1
Mathematics
Solve the problem.Jay drove 264 kilometers at the average rate of 66 kilometers per hour. How long did the trip take?
A. 5 hours
B. 
hour
C. 4 hours
D. 3 hours
Mathematics