What percent would you use when estimating 19%

Simplify the expression 10/11(22z) + (a+5) -1

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.

Use the elimination method to solve the systems of equations. choose the correct ordered pair. 7x+4y=39