A 20% apple juice is mixed with a 100% apple juice drink. The function f(x)= (2)(1.0)+x(0.2)/2+x models the concentration of apple juice in the drink after x gallons of the 20% drink are added to 2 gallons of pure juice. What will be the concentration of the Apple juice in the drink if 6 gallons of 20% drink are added? Give the answer as a percent but do not include the perfect sign (%).

Colby and jaquan are growing bacteria in an experiment in a laboratory. colby starts with 50 bacteria in his culture and the number of bacteria doubles every 2 hours. jaquan starts with 80 of a different type of bacteria that doubles every 3 hours. let x equal number of days. colbys experiment follows the model: a.) y=50*2^x b.) y=50*2^8x c.) y=50*2^12x jaquans experiment follows the model: a.)80*2^x b.)80*2^8x c.)80*2^12x

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.