64÷8•2-10=
12+19-3•8=
8•3÷6•10÷20=
12•(4+1)-100÷2=
21-18÷3=
evaluate

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?

Closing a credit card usually _your debt ratio.a. increasesb. decreasesc. improvesd. has no effect on

What are the solutions of the equation? 5z^2 + 9z - 2 = 0 a. 1, -2 b. 1, 2 c. 1/5, -2 d. 1/5, 2