Solve the problem.Junior high classes of 25 students each met in the cafeteria to take achievement tests. If exactly 5 students sat at each table and 10 tables were used, how many classes took the tests?
A. 15 classes
B. 5 classes
C. 2 classes
D. 4 classes
Answer: C
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Determine which of the following methods is the best choice for solving the given equation: factoring, using the principle of square roots or using the quadratic formula. Then, solve the equation.x2 + x + 4 = 0
A. Factoring; -1, 0
B. Square root principle or factoring; 1, 0
C. Quadratic formula; 
D. Square root principle; 
Write the product as a sum or difference containing only sines or cosines.cos(6?) cos(5?)
A. cos2(30?2)
B. 
[cos(11?) - sin ?]
C. 
[ cos ? + cos(11?)]
D. 
[cos(11?) - cos ?]
Solve the problem.
Use the graph of the polynomial function f to estimate the 
and to determine whether the leading coefficient is positive or negative.
A. -1, negative B. 1, positive C. -1, positive D. 1, negative
Find the value. Give an approximation to four decimal places.ln(569 × 24)
A. 3.8026 B. 4.1653 C. 20.1612 D. 9.5219