Assuming c is the weekly production cost of Jessica's T-shirt shack, then:
[tex]75 + 7s + 12t = c[/tex]
We have the values of s to be 30 and t to be 24, therefore:
[tex]75 + 7(30) + 12(24) = c[/tex]
Open up the brackets :
[tex]75 + 210 + 288 = c[/tex]
[tex]573 = c[/tex]
Therefore, the cost of weekly production is 573 (dollars or what? No unit?)
