The circumference of the circle is C. 61.38 cm
You just have to add one eqaution to another :
-x + x -y + 2y = 7 + 7
y = 14
Then apply y = 14 to one of the equations :
eg: x + 2(14) = 7
x + 28 = 7
x = - 21
The awnser is x= -21 y= 14
I hope i awnsered your question
Unit rate always have the denominator of 1 so:

= 360 ÷ 30 = 12 customer in 1 day so the answer is:

12 is costumer and 1 is day.
To put it simply, what needs to be done in order to answer the question is to substitute the known values from the given to the equation that is also already in the given above,
E = (0.002641)(-$25000) + (0.997359)(193.08)
Simplifying the equation,
E = 126.545
Answer: $126.545