PROBLEM 1
Evaluate the expression 9 – z when z = 4.
What’s the answer

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

Marlow is comparing the prices of two trucks rental compaines company a charges $3 per hour and an addtional $75 as serivce charges company b charges $2 per hour and an additional $85 as serivce charges

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b