If i have a 100 gallon water tank and use 5 gallons per minute while feeding it 2.5 gallons per minute will that tank run out of water

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Which of the following expressions is equal to 2x^2+8

If the value of x increases by 5, how does the value of m(x + 3) change? a) it increases by 5m. b) it increases by 8m. c) it decreases by 5m. d) it decreases by 8m.