Question

Which of these statements about algebra are true?

A. Algebra uses abstract symbols to represent concrete elements in the real world.



B. In an algebraic equation, the same variable can represent two different unknowns.



C. Many great mathematicians were also philosophers.



D. An algebraic expression contains an equal sign, but an algebraic equation does not.



E. The same variable can represent two different unknowns in two different algebraic expressions.

Answer 1

A.

Explanation:

The symbols are usually letters.

The most commonly used are x, y and z.

Answer 2

I think it's B. In an algebraic equation, the same variable can represent two different unknowns.