Afirst number plus twice a second number is 14 twice the first number plus the second totals 31

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.

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

For what value of (y) is 3^3/3^y =1/9