What is the missing coefficient? (15x^2+11y^2+8x)-(7x^2+5y^2+2x)=[bl ank]x^2+6y^2+6x
a. 4
b. 8
c. 10
d. 22

Jody bought 20 shares of amazon at the close price of $121.00. she bought 20 more shares a year later at the price of $127.00. two years later, she sold all of her shares at the price of $133.00. her broker charges $50 for each transaction. after all of these transactions, how much money did jody make?