Question

What does evaluating expressions mean? (Leave example)

Answer 1

Evaluating an expression means finding the value of the expression for some value of the variable in the expression.
(3x + 5) is an expression using the variable x.
Evaluate the expression when x = 2.
Put x = 2 in (3x + 5) and you get (3)(2) + 5 = 11
So at x =2 we have evaluated the expression and the value is 11.

Evaluate the expression when x = -1
Put x = -1 in (3x + 5) and you get (3)(-1) + 5 = 2
So at x = -1 we have evaluated the expression and the value is 2.

Answer 2

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