Use the commutative property to simplify the expression. A. 30 (12+5+ 18) = 3 (35) = 5 = 1 O B. } + } + 1 = 1+ 1 = 1 c. } +(+3) = 3 + 3 = $ = 1 OD (6 + += 57 - 38 1 .​

Given: x + y = 6. if xe (-15, -6, -1), then which of the following sets of ordered pairs are solutions? © {(-15, -21), (-6, -12), (-1, -7)} [(-15, 21), (-6, , 7)} {(-15, 21), (-6, 12), (-1, -7)}

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?

What is the absolute value of the complex number -4-sqrt2i