Depends on where you are in the math book but this would be the most simple way.
n= number
sqar(-1) = i
The sum of length and width is half the perimeter, 160 yd. The length is the average of the sum and difference of dimensions:
.. (160 +20)/2 = 90
Then the width is 160 -90 = 70
The rectangular field is 70 yd by 90 yd.
If this is the dance position you are describing, then the arm and the leg of the dancer both make "right" angles (90º angles) to the floor.
Answer:
f(x) = 2x^2+5x-12
Step-by-step explanation: