Solve the problem.The graph shows the average cost of a barrel of crude oil for the years 1981 to 1990 in constant 1996 dollars. Find the approximate average change in price from 1981 to 1990.1996 $/Barrel 
Year
A. About -$44/year
B. About -$4/year
C. About -$1/year
D. About -$24/year
Answer: B
Mathematics
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Divide.
A. -1 B. Undefined C. 40 D. -40
Mathematics
Subtract the polynomials. Assume all variable exponents represent whole numbers.(9x6 - 6x5 + 15x) - (2x6 + 12x5 + 19x)
A. 7x6 - 18x5 - 4x B. 7x6 - 18x5 + 34x C. -15x12 D. 7x6 - 4x5 + 34x
Mathematics
Find the indicated term of the arithmetic sequence.
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Mathematics
Solve the nonlinear system of equations for real solutions.
A. (4, 3), (3, 4), (-4, -3), (-3, -4) B. (-4, -3), (-3, -4) C. (4, 3), (-4, 3), (4, -3), (-4, -3) D. (4, -3), (4, 3)
Mathematics