The johnsons want to cover their backyard with new grass. their backyard is rectangular, with a length of 3x - 5 feet and a width of 4x - 10 feet. however, their rectangular swimming pool, along with its surrounding patio, has a dimension of x + 8 by x - 2 feet. what is the area of the region of the yard that they want to cover with new grass?

a. x^2 + 6x - 16 ft^2

b. 6x^2 - 55x + 104 ft^2

c. 12x^2 - 50x + 50 ft^2

d. 11x^2 - 56x + 66 ft^2

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

(50 ) 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.