I use the expression 3(2w - 10) to determine how many copies I need to make of a worksheet (w). If w = 20, how many worksheet copies do I need to make?

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