High School

A car salesman earns $90 for each day of work plus $100 for every car he sells in a day. Which of the following expresses how much the car salesman earns in one day when he sells \( c \) cars?

A. $190c$

B. $100 + 90c$

C. $100c + 90c$

D. $90 + 100c$

E. $90c + 100c$

Answer :

D. $90 + $100c is the following expresses how much the car salesman earns in one day when he sells c cars.

To determine how much the car salesman earns in one day when he sells [tex]c[/tex] cars, let's break down his earnings:

  1. The car salesman earns a fixed amount of $90 for each day of work, regardless of the number of cars he sells.

  2. Additionally, he earns $100 for every car he sells. If he sells [tex]c[/tex] cars in a day, this part of his earnings will be [tex]100c[/tex] dollars.

We need to find an expression that includes both the fixed daily earnings and the earnings from selling cars.

So, the total earnings in a day can be expressed as:

[tex]90 + 100c[/tex]

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