Solve.Let f(x) = 
. Show that f-1(x) = -7x - 5
What will be an ideal response?
Answers may vary. One possible solution is:
1. f-1 ? f
= f-1
= f-1
= -7
+ 5 = 
- 5 = x;
2. f ? f-1
= f
= f
= 
/-7 = -7x/-7 = x
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Solve the problem.Suppose that c(x) = 4x3 - 39x2 + 8324x is the cost of manufacturing x items. Find a production level that will minimize the average cost of making x items.
A. 89 items B. -70 items C. 8324 items D. There is not a production level that will minimize average cost.
Verify that the equation is an identity.cot(? - ?) = - cot ?
What will be an ideal response?
State the value of the discriminant and the number of real solutions.s2 = -5s + 1
A. 0, one B. -29, two C. 29, one D. 29, two
Find the equation of the hyperbola satisfying the given conditions.Vertices at (0, 7) and (0, -7); foci at (0, 10) and (0, -10)
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1