Answer:
x = - 1
Step-by-step explanation:
Given
2 = 3x + 5 ( subtract 5 from both sides )
- 3 = 3x ( divide both sides by 3 )
- 1 = x
I suppose the integral is

The integration region corresponds to a sector of a cirlce with radius 5 subtended by a central angle of π/4 rad. We can capture this region in polar coordinates by the set

Then
,
, and
. So the integral becomes

You have to multiple and divide
I believe Hector is correct
Explanation: for every 1 hour the income is $10, therefore working 32 hours will give you $320 as Hector stated, while working 18 hours will not give you $160 as Hannah stated, it will give you $180