Evaluate the expression.(f ? g)(a) when f(x) = 7x + 6 and g(x) = 3x - 1.
A. 21a + 5
B. 21a + 13
C. 21a + 17
D. 21a - 1
Answer: D
Mathematics
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For the compound inequality, give the solution set in both interval and graph forms.x < 2 or x < 7
A. (-?, 7)
B. (-?, 2) ? (7, ?)
C. (2, 7)
D. (2, ?)
Mathematics
Use the distance formula and the Pythagorean theorem to determine whether the set of points could be vertices of a right triangle.(-1, 5), (5, 7), (4, 2)
A. Yes B. No
Mathematics
Find the domain of the rational function.R(x) = 
A. {x|x ? 10, 3} B. {x|x ? 10, -3} C. {x|x ? - 30, 1} D. {x|x ? -10, 3}
Mathematics
Solve the problem.The half-life of carbon-14 is 5700 years. Find the age of a sample in which 8% of the radioactive nuclei originally present have decayed.
Fill in the blank(s) with the appropriate word(s).
Mathematics