Mark pulled weeds from the garden for 10 more minutes than ted.

the letter p represents the number of minutes that ted pulled weeds.

which expression shows the number of minutes that mark pulled weeds?

If p = the number of minutes that Ted pulled weeds, 

and we are given information that Mark pulled weeds from the garden for 10 more minutes than Ted, 

then the expression that shows the number of minutes that Mark pulled weeds would be simply expressed as (p + 10).