Find the slope of a line from the equation 8x - 8y =16 -solve and graph the following thanks

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Is the square root of 4 plus the square root of 16 rational?

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?