At an office supply store, Ken bought pp boxes of paper clips priced at $0.55 each and nn notebooks priced at $0.85 each. He bought a total of 10 items and paid $6.70 in all. Select the two equations that would create the best system of equations to represent this scenario.

p+n=10p+n=10

p+n=6.7p+n=6.7

pn=10pn=10

0.85p+0.55n=6.70.85p+0.55n=6.7

0.55p+0.85n=6.70.55p+0.85n=6.7

0.85p+0.55n=100.85p+0.55n=10

0.55p+0.85n=100.55p+0.85n=10

Which of these people has balanced their checkbook correctly? oa. gary: the balance in his check register is $500 and the balance in his bank statement is $500. b. gail: the balance in her check register is $400 and the balance in her bank statement is $500. c. gavin: the balance in his check register is $500 and the balance in his bank statement is $510.

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.

Your company will replace the asphalt roofs on all the buildings at the factory complex shown below. the buildings have flat roofs. you charge according to the total roof area. what is this area, in square yards?