This is a part of my test I don’t know what to do pls give me answer

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

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.

Write the rational number in lowest terms 99/-15