Answer:
41.23
Step-by-step explanation:
Mean = (23 + 50 + 49 + 48 + 49 + 32 + 37 + 40 + 41 + 42 + 41 + 41 + 43) ÷ 13
Mean = 536 ÷ 13 = 41.23 (rounded up to two decimal places)
(x-20)(x+3)
13/20
Find a same denominator.
17/20 - 1/5 = 17/20 - 4/20
= 13/20