Question 1207852
a manufacturer of jeans has fixed daily costs of $500 and variable costs of $8 for each pair of jeans manufactured. Write a linear equation that relates the daily cost C, in dollars, of manufacturing the jeans to the number x of jeans manufactured. What is the cost of manufacturing 400 pairs of jeans? 740 pairs?

The fixed daily costs are  same whether you manufacture or not.

 fixed daily costs of $500

 x jeans manufactured

The variable cost is related to numbesr produced

C= 500 +8x 

You can do the rest
In first qquestion x= 400 
in second  750 
Plug in for x you have the cost