Which expression is indefined math

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Step-by-step explanation:

Option 4 -    

Step-by-step explanation:

Given : Hanna shops for socks that cost $2.99 for each pair and blouses that cost $12.99 each.

To find : Which equation models the purchases she made with $43.92?

Solution :

Let x represent the number of pairs of socks purchased.

Let y represent the number of blouses purchased.

Hanna shops for socks that cost $2.99 for each pair.

For x pairs the cost of socks is $2.99x

Hanna shops for blouses that cost $12.99 each.

For y pairs the cost of blouses is $12.99y

Total cost she made is $43.92.

The equation form is

Therefore, Option 4 is correct.