2x+4 or -x^4+4x^3-5x^2 are examples of a , the sum or difference or monomials

A. Product
B. Polynomial
C. Power
D. Perfect square root

Solve the system of equations. y= 2x y= x^2 - 15

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?

Which expression is rational? 6. , square root two, square root 14, square root 49