Perform the indicated operation and simplify.
? 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Find the product.(10y2 - 7)(10y2 + 7)
A. 100y4 - 49 B. 100y4 - 140y2 + 140 C. 100y2 + 49 D. 10y2 - 49
Mathematics
Determine where the function is increasing and where it is decreasing.f(x) = -x2 - 8x - 7
A. increasing on (-?, -4) decreasing on (-4, ?) B. increasing on (-4, ?) decreasing on (-?, -4) C. increasing on (9, ?) decreasing on (-?, 9) D. increasing on (-?, 9) decreasing on (9, ?)
Mathematics
Solve the problem.Given the approximation sin 40° ? 0.64, use trigonometric identities to find the approximate value of cot 
If necessary, round the answer to two decimal places.
A. 1.31 B. 0.84 C. 1.19 D. 0.77
Mathematics
Graph the hyperbola.
- 
= 1
A. 
B. 
C. 
D. 
Mathematics