Shade the region of feasible solutions for the given restraints.2x + 3y ? 6 x - y ? 3 y ? 2
A. 
B. 
C. 
D. 
Answer: B
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Solve the problem.Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students, B's to the next 25%, C's to the next 40%, D's to the next 16%, and F's to the bottom 9%. What is the bottom cutoff for a D grade? Round your answer to the nearest whole number.
A. 62 B. 58 C. 65 D. 56
Estimate the answer to the problem.James' drive from home to work is 30.5 miles one way. If in a month he goes to work 19 days, then how many miles does he drive going from home to work and back in one month?
A. 1750 mi B. 1200 mi C. 900 mi D. 1500 mi
Use the theoretical probability formula to solve the problem. Express the probability as a fraction reduced to lowest terms.Use the spinner below to answer the question. Assume that it is equally probable that the pointer will land on any one of the five numbered spaces. If the pointer lands on a borderline, spin again. Find the probability that the arrow will land on an odd number. 
A. 0
B. 
C. 1
D. 
Factor the difference of two squares. 81s2 - 49
a. ( 81s + 7 ) (81s - 7 ) b. ( 81s + 49 ) ( 81s - 49 ) c. ( 9s - 7 )2 d. ( 9s - 7 ) 2 e. ( 9s + 7 ) (9s -7 )