Solve the problem using the quadratic formula.The formula d = 
is used to find the number of diagonals in certain polygons with n sides. If a polygon has 20 diagonals, how many sides does it have?
A. 11 sides
B. 7 sides
C. 9 sides
D. 8 sides
Answer: D
Mathematics
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Solve the given trigonometric equation analytically (using identities when necessary for exact values when possible) for values of x for 0 ? x < 2?.sec2 x - 2 = tan2 x
A. 
B. 
C. No solution
D. 
Mathematics
Solve the problem.Last year, Justin's average telephone bill was $96.31. Last month, his telephone bill was $139.91. How much above last year's average was last month's bill?
A. $43.50 B. $44.60 C. $43.60 D. $53.60
Mathematics
Provide an appropriate response.What are conjugate expressions? Give an example.
What will be an ideal response?
Mathematics
Factor the polynomial completely.625 - 1296b4
A. (5 + 6b)(5 - 6b)(25 + 36b2) B. (25 + 36b2)(25 - 36b2) C. (5 + 6b)2(5 - 6b)2 D. 625 - 1296b4
Mathematics