In a school survey, students showed these preferences for instructional materials. Answer the question.
About how many students would you expect to prefer radio in a school of 550 students?
A. About 198 students
B. About 5 students
C. About 99 students
D. About 28 students
Answer: D
Mathematics
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Solve.x2 + y2 + 10y = 0x2 + y2 = 5x
A. (0,1) 
B. (1,0) 
C. (0,0) 
D. (1, -1) 
Mathematics
Simplify the algebraic expression.-0.47y3 - 0.58y3
A. -1.05y3 B. -0.11y3 C. -0.11y6 D. -1.05y6
Mathematics
Solve the problem.The number of liters of blood pumped through the lungs in one minute is given by C = 
Suppose a = 150, b = 180, v = 120. Estimate the change in C if a becomes 140, b becomes 186, and v changes to 128.
A. 0.6 liters B. -0.2 liters C. 3.4 liters D. 3.8 liters
Mathematics
Add the numbers using the number line.99 + (-91) 
A. -190 B. 8 C. -8 D. 190
Mathematics