Solve.The child-proof cap of a medicine bottle will not function properly if the radius r of the cap is more than 51.6 millimeters or less than 51.3 millimeters. Express this as an inequality.
A. r < 51.3 or r > 51.6
B. 51.3 ? r ? 51.6
C. r ? 51.3 or r ? 51.6
D. 51.3 < r < 51.6
Answer: A
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÷
= 
? 
= 
A. 6 in the numerator and 3 in the denominator B. 3 in the numerator and 6 in the denominator C. 9 in the numerator and 36 in the denominator D. 3 in both the numerator and the denominator
Solve the system using substitution.
A. (12, -3) B. (3, 12) C. (-12, 3) D. (12, 3)
Answer the question.The ordered pair (3, 4) is a solution of the equation 
Fill in the blank(s) with the appropriate word(s).
Solve the problem.The following scatter diagram shows heights (in inches) of children and their ages.Height (inches)
Age (years)What is the expected height range for a 2-year old child?
A. 25-38 inches B. 20-30 inches C. 35-45 inches D. 40-50 inches