A coefficient is simply the number placed in front of a letter in an algebraic term. Sometimes the number also has a positive or negative sign attached to it.
For example, look at the expression 7a + 3b - 4a
The letter a has two coefficients: 7 and -4
The letter b has one coefficient: +3
When we simplify algebraic expressions we combine the coefficients of like terms.
Simplify 3b + 4b - b
Look at the coefficients of 3b + 4b - b which are 3b + 4b -1b
Combine them to get 3 + 4 -1 = 6
So the answer is 6b
In this activity, we are going to be combining like terms.
Are you ready to begin?