A jar of peanut butter costs $6.95 plus sales tax. After sales tax the jar of peanut butter costs $7.30. What is the sales tax rate to the nearest percent?

Which system of linear inequalities is graphed? can somebody pleasssse

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

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.