I need help with my math

The system of equations graphed below has how many solutions? y = 2x + 2

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52

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