Solve. Assume the exercise describes a linear relationship.Persons taking a 30-hour review course to prepare for a standardized exam average a score of 620 on that exam. Persons taking a 70-hour review course average a score of 802. Find a linear equation which fits this data, and which relates score to review time. Use this equation to predict an average score for persons taking a 57-hour review course. Round your answer to the nearest tenth.
A. 747.1
B. 756.9
C. 735.6
D. 742.9
Answer: D
Mathematics
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Write a system of inequalities whose solution set is the region shown.
A. y ? 0 x2 + y2 ? 16 B. y ? 0 x2 + y2 ? 16 C. y ? 0 x2 + y2 ? 16 D. y ? 0 x2 + y2 ? 16
Mathematics
Solve.5x3 + x2 - 5x - 1 = 0
A. 1 , -1 , - 
B. 1 , 
C. -1 , 5
D. 1 , -1
Mathematics
Solve the problem.Find the volume of the solid that is generated by revolving the area bounded by 
and 
about the x-axis.
A. 
? ln (6)
B. 
? ln (37)
C. 
? ln (6)
D. 
? ln (37)
Mathematics
Identify the domain and range of the relation.{(8, 13), (-7, 3), (4, -3), (8, -3), (-7, 13)}
A. Domain: {13, 3, -3, -3}, Range: {8, -7, 4} B. Domain: {8, -7, 4}, Range: {13, 3, -3, -3, -13} C. Domain: {8, -7, 4}, Range: {13, 3, -3, -3} D. Domain: {8, -7, 4, -8}, Range: {13, 3, -3, -3}
Mathematics