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given the proportion

=

. what ratio completes the equivalent proportion

?

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?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Find the value of x for which abcd must be a parallelogram -9-6x x-30