A) if the perimeter of a square is 80 m
find its side and its area.

The side of the square is 20 meters and area is 400 sq, meters

Step-by-step explanation:

The perimeter of a square with side length a is given by, P = 4a.

Now, given that 4a = 80

⇒ a = 20 meters.

Therefore, the area of the square is, A = a² = 20² = 400 square meters.  

Hence, the side of the square is 20 meters and the area is 400 sq, meters. ( Answer )

company a

step-by-step explanation:

using the linear regression models , it is found that company a   pays about $14 more. but using the same regression (linear) company b pays about $10 more.

so company a pays more than b

y=-2.5x+12.5

step-by-step explanation:

5y=2x+10

y=0.4x+2

slope=-2.5

5=-2.5*3+b

b=12.5