Use the inverse of the coefficient matrix to solve the system of equations. y + z = 3,3x -z = 8, 2x + y + 3z = 7; A-1 = - 
A. 
B. 
C. 
D. 
Answer: D
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Write a formula for the nth term of the geometric sequence.8, -16, 32, -64, 128, . . .
A. an = 8(-2)n - 1 B. an = 8(-2)n C. an = 8(-2n) D. an = a1 - 2n
Solve the problem.The rate of expenditure on a particular machine is given by dM/dx = 9x
, where x is time measured in years. Maintenance costs for the second year are $74. Find the total maintenance function, M.
A. M = 3(x2 + 5)3/2 + 65 B. M = 9(x2 + 5)3/2 - 7 C. M = 9(x2 + 5)3/2 + 65 D. M = 3(x2 + 5)3/2 - 7
Based on its existing sales, what is the formula for calculating the full-capacity sales of a firm?
A. Full-capacity sales = Existing sales level ÷ Percent of capacity used to generate existing sales level B. Full-capacity sales = Future sales level ÷ (1 - Percent of capacity used to generate existing sales level) C. Full-capacity sales = Future sales level ÷ Percent of capacity used to generate existing sales level D. Full-capacity sales = Future sales level ÷ (1 + Percent of capacity used to generate existing level of assets) E. Full-capacity sales = Existing sales level ÷ (1 - Percent of capacity used to generate existing level of assets)
List the ordered pair corresponding to the indicated point.
J
A. (0, 3) B. (3, 0) C. (0, -3) D. (-3, 0)