The amount of money that Li spends on a video game depends on how many game he purchases. if Li has at most $90 to spend on games for his Xbox 360 and the games cost $22.50 each, what is the domain of this function?
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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?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)