Apainting is on sale at 50% off the sale price is $320 what was the original price show work

Suppose the probability of selling a car today is 0.28. find the odds against selling a car today.

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?

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)