Question

Is x+y is an algebraic expression?

Answer 1

"In mathematics, an algebraic expression is an expression built up from integer constants, variables, and the algebraic operations (addition, subtraction, multiplication, division and exponentiation by an exponent that is a rational number). For example, 3x2−2xy+c is an algebraic expression.

Answer 2

Algebraic expressions typically consist of numbers, letters, symbols etc. like tony said. The expression you wrote above would be algebraic because it consists of letters. :)