The formula P = 2 L + 2w gives the perimeter P of a rectangular room with length

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?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.