Answer: The number of copies of worksheet needs to be done = 90
Step-by-step explanation:
The expression used to evaluate the number of copies need to make of the worksheet (denoted as 'w') is given as 3(2w - 10).
If w=20, then the number of copies need to make of worksheet = 3(2(20)-10)
i.e. the number of copies need to make of worksheet= 3 (40-10)
i.e. the number of copies need to make of worksheet= 3 (30)
i.e. the number of copies need to make of worksheet= 3 x 30
i.e. the number of copies need to make of worksheet= 90
Hence, if w = 20, then the number of copies of worksheet needs to be done = 90
