Which of the following is a monomial?
a. 2x + yz
b. 2x − yz
c. 2 + xyz
d. 2xyz^2

Which of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?

Robert is placing sod in two square shaped areas of his backyard. one side of the first area is 7.5 feet. one side of the other area is 5.7 feet. the sod costs y dollars per square foot

Calculate the mean value (expected value) of the following discrete variable x (10 points): x = 0, 1, 2, 3, 4, 5, 6 p(x) = 0.2, 0.2, 0.15, 0.15, 0.15, 0.1, 0.05