Multiply and simplify.-6z ? 
A. 0
B. 36z
C. 1
D. -1
Answer: C
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Find the midpoint of the line segment joining the two points.(0, -4) and (-1, 4)
A. 
B. (1, -8)
C. 
D. (-1, 0)
Find the indicated probability.If P(A) = 0.4, P(B) = 0.5, and P(A or B) = 0.7, find P(A and B).
A. P(A and B) = 0.2 B. P(A and B) = 0.7 C. P(A and B) = 0.1 D. P(A and B) = 0.9
Provide an appropriate response.The national debt of a country is $14,160,000,000 and the population is 3,540,000. What is the debt per person? Write answer without exponents.
A. $400 B. $40,000 C. $4000 D. $50,126,400
Write the rate as a unit rate.In a region, the total number of students enrolled in public schools in a recent year was 455,057. At the same time, there were 24,432 public school teachers. Write a unit rate in students per teacher. Round to the nearest whole student.
A. 20 students/teacher B. 21 students/teacher C. 18 students/teacher D. 19 students/teacher