Write the number as a product of a real number and i. Simplify the radical expression.
A. -i
B. 13i
C. ± 13
D. -13i
Answer: B
Mathematics
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Find 
.y = x7/5
A. x2/5
B. 
x2/5
C. 
x-2/5
D. 
x6/5
Mathematics
Factor the GCF from the polynomial.(9w + 7)(w + 9) + (w + 1)(w + 9)
A. 2(2w + 18)(5w + 4) B. (w + 9)(10w + 1) C. (w + 9)(10w + 8) D. 2(w + 9)(5w + 4)
Mathematics
A professor grades students on two tests, three quizzes, and a final examination. Each test counts the same as three quizzes and the final examination counts the same as two tests. Maegan has test scores of 85 and 97. Maegan's quiz scores are 85, 74, and 85. Her final examination score is 96. Use the weighted mean formula to find Maegan's average for the course. The professor rounds averages to the nearest integer.
a. 87 b. 91 c. 89 d. 88 e. 66
Mathematics
Evaluate the determinant.
A. 36 B. -38 C. -36 D. 12
Mathematics