Eric par active piano and guitar for 8 hrs. he practice the piano for 1/4 of that time. how many hours did eric practice the piano this week?

What is the common difference in the following arithmetic sequence 7,3,-1,-5

Arectangular exercise mat has a perimeter of 36 feet the length of the mat is twich the width writeand solve an equation to determine the length in feet. of the mat then find the area in square feet of the mart

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian 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? i need this done