Solve the problem.Junior high classes of 20 students each met in the cafeteria to take achievement tests. If exactly 8 students sat at each table and 25 tables were used, how many classes took the tests?
A. 12 classes
B. 10 classes
C. 23 classes
D. 13 classes
Answer: B
Mathematics
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Factor the sum or difference of cubes.27y3 - 27
A. (3y + 1)(y2 - y - 1) B. 27(y - 1)(y2 + y + 1) C. (27(y - 1)(y2 + y + 1) D. 3(3y + 1)(3y2 - y - 1)
Mathematics
Solve the equation.
= 9
A. {9}
B. {81}
C. 
D. 
Mathematics
Graph the system of inequalities.
A. 
B. 
C. 
D. 
Mathematics
Evaluate.
? 
+ 
? 
A. 
B. 
C. 
D. 
Mathematics