People use water to​ cook, clean, and drink every day. An estimate of 28.5​% of the water used each day is for drinking. If a family uses 68.4 gallons of water a day for drinking​, how many gallons do they use every​ day?

Show algebraically that f and g are inverse functions f(x)=x^2/-6; g(x)=square root of 2x+12

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

Need this asap if anyone can i would be very grateful. if you could show workings that would really