Which of the following is true of the commutative property under subtraction? a. 10 + 9 = 9 + 10 b. 10 – 9 = 10 – 9 c. 10 – 9 ≠ 9 – 10 d. 10 – 9 = 10 + 9

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?

Use the data on the dot plot to answer the question.how many people read for more than three hours last week? i'm on a unit test review

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