What each part of the expression represents in the context of the problem include the following:
- r represents the original cost of the repair.
- 0.07r represents the tax.
- (r – 20) represents the discount.
<h3>What is an algebraic expression?</h3>
An algebraic expression is a mathematical equation that can be used for showing the relationship which exist between two or more variables, numerical quantities, as well as in conjunction with different mathematical operations.
<h3>What is a coefficient?</h3>
In Mathematics, a coefficient simply refers to a constant numerical value (number or numeral) that written before the variable in any algebraic expression.
Given the following algebraic expression:
0.07r + (r – 20)
In the context of fixing David’s broken watch, the variable r represents the original cost of the repair while 0.07r most likely represents the amount of money charged as tax. Lastly the expression (r – 20) represents the discount on fixing David’s broken watch.
Read more on algebraic expression here: brainly.com/question/4344214
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