Find the product.(2x + 7y)(2x - 7y)
A. 4x2 + 49y2
B. 4x2 + 28xy - 49y2
C. 4x2 - 49y2
D. 4x2 - 28xy - 49y2
Answer: C
Mathematics
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In a school survey, students showed these preferences for instructional materials. Answer the question.
About how many students would you expect to prefer TV in a school of 700 students?
A. About 140 students B. About 12 students C. About 84 students D. About 126 students
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Solve.
+ 
= -1
A. No solution
B. 5
C. 0
D. - 
Mathematics
Simplify the expression.-4(10r + 7s) + 9(9r + 8s)
A. 41r + 44s B. 6r + 3s C. -68rs D. 41r + 7s
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Decide whether or not the ordered pair is a solution of the system.(3, -1)y = 5 - 2x 4x = 10 - 2y
A. Yes B. No
Mathematics