Solve.If y varies inversely as the cube of x, and y = 9 when x = 7, find y when x = 21.
A. 1
B. 3
C. 27
D. 
Answer: D
Mathematics
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Solve the inequality, giving its solution set in both interval and graph forms.7x < -70
A. (-?, -10]
B. [-10, ?)
C. (-?, -10)
D. (-10, ?)
Mathematics
Solve the problem.In order to measure the distance across a pond (from A to B), Yuko made some measurements, which are given below the drawing. What is the distance (to the nearest unit)? src="https://sciemce.com/media/4/ppg__ttt0611191524__f1q304g6.jpg" alt="" style="vertical-align: -4.0px;" /> 
A. 125 yd
B. 173 yd
C. 157 yd
D. 138 yd
Mathematics
Complete the magic (addition) square.Use each number 8, 9, 10, 11, 12, 13, 14, 15, and 16 once.
A. 
B. 
C. 
D. 
Mathematics
Solve the equation.-3.4 = 14 - x
A. x = 10.1 B. x = 10.6 C. x = 17.4 D. x = 16.9
Mathematics