Solve.Find f-1 for the function f = {(8, 7), (4, -1), (9, 1)}.
A. 
B. Not invertible
C. {(7, 8), (-1, 4), (1, 9)}
D. {(7, -1, 1)}
Answer: C
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Solve the system of equations by determinants. 6w + 3x - 6y + z = -36-w + x + 5y - z = 313w - x + y + 5z = -5 w + x + 6y - z = 39
A. w = 1, x = -2, y = -6, z = -3 B. w = -1, x = -1, y = 6, z = -6 C. w = 1, x = -1, y = 6, z = -3 D. w = 6, x = 1, y = 1, z = -6
Solve the equation.-114 + (-19) = 6x + x
A. 1 B. -19 C. -120 D. 120
Solve the problem.If A is a golden rectangle, a gnomon to A is
A. another golden rectangle whose longer side equals the shorter side of A. B. another golden rectangle whose shorter side equals the longer side of A. C. a square of sides equal to the longer side of A. D. a square of sides equal to the shorter side of A. E. none of these
Solve the problem.Revenues for an online retail store are shown in the table for various years. Let r be the store's revenue (in millions of dollars) for the year that is t years since 1995.
a. Use the linear model to estimate the revenue in 1995.b. Use the linear model to predict the revenue in 2006.c. Use the model to estimate the revenue in 2003. Is this an underestimate or overestimate? Calculate the error in the estimate.
What will be an ideal response?