Here are the prices of some items and the amount of sales tax charged on each in Nevada Cost of item:
10$. Sales tax: 0.46

50$ sales tax: 2.30

5$ sales tax: 0.23

Write an expression for the amount of sales tax charged, in dollars, or an item that costs c dollars.

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

With alll of except for the 2 that i did already

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is