Which equation has a solution of k = 6.5?

K=6.5

We move all terms to the left:

k-(6.5)=0

We add all the numbers together, and all the variables

k-6.5=0

We move all terms containing k to the left, all other terms to the right

k=6.5

I labeled each shape
Area of trapizoid :(b1+b2)/2 ×h
Area of rectangle/square: l×w
Area of Traingle: (l×w)/2

1) A.Triangle+A. Square
(6×4)/2+10×10=
24/2+100
12+100=112in^2

2)A. Triangle+A. Rectangle
4×(Square root)33/2+17×10
4×5.74/2+170
23/2+170
11.5+170=181.5in^2

3)A. Rectangle+A. Rectangle
8×2+7×3
16+21=37cm^2

4)A. Trapizoid+A. Rectangle
(4+18)/2×13+26×18
22/2×13+468
11×13+468
143+468=611m^2