If three times a number decreased by 10 is 25, what is the number

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

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

What power can you write to represent the volume of the cube shown? write the power as an expression with a base and an exponent and then find the volume of the cube