5l of 70% alcohol solution was mixed with 9l of pure water what is the concentration of the mixture

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212