When 2/5 of a certain number is added to the number and this sum is subtracted from 108, the result is the original number. What is the original number？

A. 35
B. 45
C. 54
D. 135/2
E. 270

-4≤x≤4 -8≤y≤-4<br>Column A Column B<br>The greatest possible value of 25x-12.5y 200

A. if the quantity in Column A is greater
B. if the quantity in Column B is greater
C. if the two quantity are equal
D. if the relationship cannot be determined from the information given

Nine pieces of paper numbered consecutively from 1 to 9 are put into a hat. If one piece of paper is drawn at random from the hat, what is the probability that it will have an even number？

A. 1/9
B. 2/9
C. 4/9
D. 1/2
E. 5/9

A research scientist wants to study a certain attribute of dogs. It is estimated that approximately 5 percent of all dogs have this attribute. If the scientist wants to study a sample of N dogs having the attribute, approximately how many dogs should be screened in order to obtain the desired sample size？

A. N/5.
B. 5N.
C. 20N.
D. 105N.
E. 120N.

In the year shown in which the median price of existing homes sold was closest to the median price of new homes sold, approximately how many million existing homes were sold？

A. 1.2
B. 1.6
C. 2.0
D. 2.4
E. 2.8

Exactly four faces of a rectangular solid are painted.<br>Column A Column B<br>The fraction of the surface area that is painted 2/3

A. if the quantity in Column A is greater
B. if the quantity in Column B is greater
C. if the two quantity are equal
D. if the relationship cannot be determined from the information given

For x=4, 3x2-5x+9=______

What are the common factors of 7 and 42？

If f(x)=x2, find f(x+1).

If the function f(x)=x+2, and the function g(x)=3x, what is the function g{f(x)}？