If numbers are considered like terms, why are letters not considered like terms?

A rectangle has the following vertices: A (-1,9), B (0, 9), C (0, - 8), D (-1, - 8). What is the area of rectangle ABCD?

Use the formula F=9/5C+32 to convert 24°c to degree F

What is the equation 9-x2=9

Find the quadratic polynomial ax^2+bx+c which best fits the function f (x) = 8^x at x=0, in the sense that g (0) = f (0), and f' (0) = g' (0), and f'' (0) = g'' (0). g (x) = ?

Find an exact value. sine of eleven pi divided by twelve.

A box contains one yellow, two red, and three green balls. Two balls are randomly chosen without replacement.

Three brothers share 2 sandwiches equally. Hoe much of a sandwich does each brother get?

The mathematics department of a college has 6 male professors, 12 female professors, 10 male teaching assistants, and 9 female teaching assistants.

The base of a triangular prism has an area of 18 square inches. If the height of the prism is 9.5 inches, what is the volume of the prism?

Expressions equivalent to - 3 (m-4mn)