Respuesta :

64.8 , just multiply 5.4 x 12= 64.8 quarts of shampoo. I hope this helped you. (12 bc a year has 12 months)

The number of quarts of shampoo does Elena need to order, When she wants to order for the year, is 64.8.

What is an unknown variable?

Unknown variables are used to find the unknown values of the problem using the algebraic expressions.

To find the values of unknown quantity, the statements of a problem is converted in the algebraic equation form using the variable in place of unknown numbers.

Elena’s Hair Salon uses an average of 5.4 quarts of shampoo per month. Let suppose that she needs to order n quarts of shampoo in a year.

As it is known that there are total 12 months in a year and Elena’s Hair Salon uses an average of 5.4 quarts of shampoo per month. Thus, the number of quarts of shampoo does she need to order is,

[tex]n=5.4\times12\\n=64.8\\[/tex]

Thus, the number of quarts of shampoo does Elena need to order, When she wants to order for the year, is 64.8.

Learn more about the unknown variable here;

https://brainly.com/question/1235185

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