Michael breeds chickens and ducks. last month, he sold 5 0 5050 chickens and 3 0 3030 ducks for $ 5 5 0 $550dollar sign, 550. this month, he sold 4 4 4444 chickens and 3 6 3636 ducks for $ 5 3 2 $532dollar sign, 532. how much does a chicken cost, and how much does a duck cost?

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.