Evaluate the expression 20- 2m for each of the values of m below

1.m=0
2.m=2
3.m= -5

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?

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

You buy five cds at a sale for $5.95 each. write an expression for the total cost of the cds. then use the distributive property and mental math to evaluate the expression.