Answer:
Alex will be able to earn $60 for that 4-week period.
Step-by-step explanation:
It is given that
Income to Alex each week by babysitting and running errands:
$20.
To find the 4-week period earning, we need to add the value $20 for 4 times:
20 + 20 + 20 + 20 = $80
OR
In other words, 4 week period earning = 4 [tex]\times[/tex] 20 = $80
But, Alex was sick at one of the weekends, so $20 would be earned less.
Hence, during that 4-week period, total earning = $80 - $20
[tex]\Rightarrow[/tex] $60
So, Alex will be able to earn $60 for that 4-week period.