Find the interval of convergence of the series.
A. 7 < x < 9
B. -9 < x < 9
C. x < 9
D. 7 ? x < 9
Answer: A
Mathematics
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Find the GCF of 40, 45, and 50.
A. 10 B. 8 C. 1 D. 5
Mathematics
Rationalize the denominator. Assume all variables represent positive numbers.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A young married couple had a combined annual income of $43,000. If the wife made $3000 more than the husband, write these relationships as a system of equations. Let x represent the husband's income and let y represent the wife's income.
A. x + y = 3000 y = x + 43,000 B. x + y = 43,000 y = 3000 C. x + y = 43,000 y = x + 3000 D. x - y = 43,000 y = x + 3000
Mathematics
Subtract.214 - 71
A. 155 B. 133 C. 243 D. 143
Mathematics