Multiply and simplify.
? 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Find 
.y = (cos x)
A. (cos x)
ln (
)
B. -(cos x)
-1 sin x
C. 
(cos x)
-1
D. -
(cos x)
-1 sin x
Mathematics
Solve the problem.To get a B in biology, Katie must have a mean score of 81 on five lab reports. Scores on the first four lab reports were 92, 77, 79, and 82. What is the lowest score that Katie can get on the last lab report and still receive a B?
A. 71 B. 83 C. 82 D. 75
Mathematics
Solve the problem.The six Cane brothers spent $88.24, $70.12, $55.74, $57.84, $70.88, and $51.13 on groceries. Find the mean grocery bill.
A. $98.49 B. $65.66 C. $78.79 D. $66.79
Mathematics
Simplify the expression. Express the answer so that only positive exponents occur. Assume that all variables are positive.(9x12y-4)1/2
A. 
B. 
C. 
D. 3x6y2
Mathematics