If x,y, and z are positive integers such that the value of x+y is even and the value of (x+y)^2 (squared)+x+z is odd, which of the following must be true?
a) x is odd
b) x...

A regulation for riding a certain amusement park ride requires that a child be between 30 inches and 50 inches tall. Which of the following inequalities can be used to determine whether or not a child's...

If k,n, and r are integers, let k^(n,r) be defines to be true onlu if n<k<r. If -2^(n,0) is true, which of the following could be a possible value of n?
I. -3, II. -1, III. 3
a) I only
b)...

The eggs in a certain basket are either white or brown. If the ratio of the number of white eggs to the number of brown eggs is 2/3, each of the following could be the number of eggs in the basket...

A certain triangle has two angles that have the same measure. If the lengths of two of the sides of the triangle are 50 and 30, what is the least possible value for the perimeter of the triangle....

A group of students washed cars to raise money. The net amount A, in dollars, raised by washing K cars is given by the function A(K)=4K-30. If the group washed 15 cars, what is the net amount they...