Each hour you work is already $7.00, without overtime (more than 40 hours a week)
So if you work 40h and earn $7.00 a week, 40h*$7.00 = $280
but since you work 50 hours, 10 hours are over time so you earn 1.5*the $7.00 which is $10.50 for those 10 hours
So $10.50*10h = $105
So now you add the 280 you already made plus the $105 in over time.
105+280
The answer is $385
Finding the perimetre: 7x+4x-3+x=12x-3
Good luck!
