1. 9 students volunteer for a committee. how many different 6-person committees can be chosen?
choose one answer.
a. 1
b. 362,880
c. 60,480
d. 84
2. identify the sampling method.
you want to determine the number of text messages students at your school make in a month. you randomly ask everyone in each of your classes.
choose one answer.
a. random
b. systematic
c. stratified
d. none of these

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3