9.) Last year Jamie bought a car for "d" dollars. One year later, the value of the car can be represented by the expression 0.68d. What is another way to describe the change in the value of the car?
A. 68% decrease in the value
B. 32% decrease in the value
C. 68% increase in the value
D. 32% increase in the value

Factor the polynomial expression x6 – x3 – 20

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25

Mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.