Solve the problem.The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test. The following regression equation is obtained: 
where x is number of hours studied and y is the test score. Predict the score on the test of a student who studies 12 hours. Round your answer to the nearest tenth.
A. 75.1
B. 85.1
C. 85.3
D. 80.1
Answer: D
Mathematics
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A. 36 cm3 B. 98 cm3 C. 567 cm3 D. 126 cm3
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In the figure below, a = 10, b = 12 and d = 15 Use this information to solve the parallelogram for b. The diagonals of the parallelogram are represented by c and d. Round answer to two decimal places.
A) 91.50°
B) 91.13°
C) 94.54°
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E) 85.46°
Mathematics