Perimeter of Rectangle: 2W + 2L
One L is the river so we have 3 sides
420m/3 = 140m
Area of Rectangle is WL
140×140= 19,600 Sq meters
I'm assuming you may have another mathematical system the teacher wants you to use. Yet, I get Area is 19,600 Sq meters
To answer this first we set up a proportion and then solve. Lets do it:-

Cross Multiply:-
80 · 4 = 320
Divide:-
420 ÷ 12 = 60
So, 180 ears of corn are for
$60.Hope I helped ya!!
Use the slope formula

and plug in the values for x and y.
Answer:
2.5z^2+3z+4.2
Step-by-step explanation:
Answer: x=-14
Step-by-step explanation: -x+8+3x=x-6
2x+8=x-6
2x=x-14
x=-14