Simplify.
ln x - ln 5
A. ln
B. ln(
- 5)
C. ln
D. ln 
Answer: C
Mathematics
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Divide.(4r3 - 3r2 - 8r - 4) ÷ (r - 2)
A. 4r2 + 5r + 
B. 4r2 + 5r + 2
C. r2 + 2r + 5
D. 4r2 - 5r - 2
Mathematics
Solve.The ratio of the weight of an object on Earth to the weight of the same object on Pluto is 100 to 3. If a buffalo weighs 3774 pounds on Earth, find the buffalo's weight on Pluto. (Round to the nearest pound.)
A. 11,322 lb B. 113 lb C. 1,132,200 lb D. 8 lb
Mathematics
Perform the indicated operation.(6a - 0.4) + (12a + 0.5)
A. 72a2 - 19.9 B. 18a + 0.1 C. 18a2 + 0.1 D. 18a - 1
Mathematics
Use the substitution method or the elimination method to solve the system. If the system has infinitely many solutions, express the ordered pair in terms of x or y. 5x - 7y = 9-20x + 28y = -27
A. no solution
B. 
C. (5, 9)
D. (4, 3)
Mathematics