the graph of y=4x^2-4x-1 is shown use the graph to estimates for te solutions of. i) 4x^2-4x-1=0 ii) 4x^2-4x-1=2

Ineed in figuring out this problem.

Ateam of runners is needed to run a 1 2 -mile relay race. if each runner must run 1 4 mile, how many runners will be needed?

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters