Find the nth term and the indicated term of the arithmetic sequence whose initial term, a, and common difference, d, are given.a = 5; d = 2an = ?; a13 = ?
A. an = 3 + 2n; a13 = 29
B. an = 3 - 2n; a13 = 29
C. an = 5 + 2n; a13 = 29
D. an = 3 + 2n; a13 = 21
Answer: A
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Use the method of writing each premise in symbols in order to write a conclusion that yields a valid argument.Smiling people are happy. Alert people are not happy. Careful drivers are alert. Careless drivers have accidents.
A. Careful drivers have accidents. B. Careful drivers are happy. C. People who smile are alert. D. People who smile have accidents.
Solve the problem.The gravitational force (in lb) of attraction between two objects is given by 
where x is the distance between the objects. If the objects are 10 ft apart, find the work required to separate them until they are 50 ft apart. Express the result in terms of k.
A. 
k
B. 
k
C. 
k
D. 
k
Find the area bounded by the given curves.y = x2, y = 4
A. 
B. 
C. 
D. 
Factor completely.16y2 + 72y - 40
A. (16y - 8)(y + 5) B. (2y - 1)(8y + 40) C. 8(2y - 1)(y + 5) D. 8(2y + 1)(y - 5)