Answer:
the total number of screws used was (25) + (10), or 35.
Step-by-step explanation:
She used 1/5 of the screws, which comes to (1/5)(125 screws), up front:
(1/5)(125) = 25.
This left 100 screws.
She used 1/10 of these, or 10, screws on a different project.
Thus, the total number of screws used was (25) + (10), or 35.
