How many ounces of a 20% alcohol solution must be mixed with 19 ounces of a 25% alcohol solution to make a 21% alcohol​ solution?

Asystem of linear equations contains two equations with the same slope. select all of the correct statements. i a. the system may have two solutions. - b. the system may have infinitely many solutions. c. the system may have one solution. o d. the system may have no solution. submit

The accompanying data represent the miles per gallon of a random sample of cars with a three-cylinder, 1.0 liter engine. (a) compute the z-score corresponding to the individual who obtained 42.342.3 miles per gallon. interpret this result.

Find the value of x. also give me an explanation so i can complete it to other questions as well, : )