Factor the binomial completely.s14 - a2
A. (s7 + a)2
B. (s7 - a)2
C. (s7 + a)(s7 - a)
D. prime
Answer: C
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Solve the problem.The perimeter of a rectangle is six times the width. If the length were increased by 4 inches and the width by 7 inches, the perimeter would be 160 inches. What is the width?
A. 23 in. B. 69 in. C. 138 in. D. 46 in.
Simplify. Be sure to rationalize the denominator. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Compute the compound interest.$7000 is invested at 6% compounded quarterly. In how many years will the account have grown to $12,000? Round to the nearest tenth of a year.
A. 9.1 yr B. 9.3 yr C. 1.1 yr D. 17.7 yr
An arithmetic sequence is given. Find the common difference and write out the first four terms.{sn} = {8 - 4n}
A. d = 4; s1 = 4, s2 = 8 , s3 = 12 , s4 = 16 B. d = -4; s1 = 4, s2 = 2 , s3 = -2 , s4 = -6 C. d = -4; s1 = 4, s2 = 0, s3 = -4, s4 = -8 D. d = -4; s1 = -4, s2 = -8, s3 = -12, s4 = -16