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A carpet company charges $4 per square foot plus a $100 installation charge. Write an expression for the total cost of x square feet of carpet.

Sagot :

Parrainidn

Answer: 4x + 100

Step-by-step explanation:

The company charges $4 per foot plus an installation charge of $100.

There is therefore both a fixed element and a variable element.

The fixed element is the $100 installation charge

The variable element is 4 * the number of square feet of carpet which is x: 4 * x

Formula puts them together to give:

= Variable cost + Fixed cost

= 4 * x + 100

= 4x + 100

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