For the function f, use composition of functions to show that f-1 is as given.
, 
What will be an ideal response?
Answers may vary. One possible solution is:
1. (f-1 ? f)(x) = f-1(f(x)) = f-1
= 
= 
= x;
2. (f ? f-1)(x) = f(f-1(x)) = f
= 
3 - 7 = x + 7 - 7 = x
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Simplify the sum.(-x + 2) + (5x + 3)
A. 4x + 5 B. 4x -1 C. 6x + 5 D. 4x2 + 5
Given a group of students: 
or 
count the different ways of choosing the following officers or representatives for student congress. Assume that no one can hold more than one office.Three representatives, if two must be male and one must be female
A. 6 B. 2 C. 4 D. 12
Solve the variation problem.The intensity I of light varies inversely as the square of the distance D from the source. If the intensity of illumination 5 feet from a light is 2 foot-candles, what is the intensity 15 ft from the light?
A. 2 foot-candles
B. 1
foot-candles
C. 
foot-candles
D. 
foot-candles
Find the length s. Round the answer to three decimal places.
A. 8.796 yd B. 2.244 yd C. 4.398 yd D. 11.141 yd