Which system of linear equations has no solution? -5x + 2y = -8
-5x + 2y = 8

-5x + 2y = -8
- x + y = -4

-5x + 2y = -8
25x - 10y = 40

-5x + 2y = -8
5x + 2y = 8

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?

Two lines that do not intersect are skew. always sometimes or never

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?