Does anyone know the answer to this question

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

5/6+7/8what is the answer sealsdbdbshd

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.