Decide whether the given functions are inverses.f = {(3, 4), (4, 6), (5, 8), (6, 10), (7, 12)}g = {4, 3), (6, 4), (8, 5), (10, 6), (12, 7)}
A. No
B. Yes
Answer: B
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Use the Gauss-Jordan method to find A-1, if it exists.A =
A.
B.
C.
D. Does not exist
Solve the percent problem.If Gloria received a 8 percent raise and is now making $22,680 a year, what was her salary before the raise?
A. $21,680 B. $22,000 C. $21,000 D. $20,680
Solve the problem.A farmer has 1,600 yards of fencing to enclose a rectangular garden. Express the area A of the rectangle as a function of the width x of the rectangle. What is the domain of A?
A. A(x) = -x2 + 800x; {x|0 < x < 800} B. A(x) = -x2 + 1,600x; {x|0 < x < 1,600} C. A(x) = -x2 + 800x; {x|0 < x < 1,600} D. A(x) = x2 + 800x; {x|0 < x < 800}
Solve the problem.A 6-sided die is rolled. What is the probability of rolling a number less than 6?
A.
B.
C.
D.