Yolanda is buying supplies for school. She buys n packages of pencils at $1.40 per package and m pads of paper at $1.20 each. What does each term in the expression 1.4n+ 1.2m represent? What does the entire expression represent?

1.4n will represent the price for (n) packs of pencils

1.2m will represents the price for (m) packs of paper

1.4n+1.2m as a whole, will represent her total cost.

It's like discovering the answer to a puzzle. the purpose in solving an equation is to find the value or values of the variable that makes it a true statement. any value of the variable that makes the equation true is called a solution to the equation.