How many x-intercepts does f(x)= x²+3x+3 have?

What is the solution of the systems of equations? y=2/3x+3 x=-2

What is the y-intercept of the line given by the equation

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