Simply. 4m - 5.
3(m-5)+m
First, use distributive property
3m-15+ m
Combine like terms
3m + m
The answer
4m - 15
The midpoint of 85 and 90 is 87
Composite figure is made up of 4 triangles and a square.
Area of Square = Length x Length
Area of Square = 12 x 12
Area of Square= 144 cm²
Area of triangle = 1/2 x base x height
Area of triangle = 1/2 x 12 x 8
Area of triangle = 48 cm²
Area of 4 Triangles = 48 x 4
Area of 4 Triangles = 192 cm²
Total Area = 144 + 192 = 336 cm²
Answer: 9.34 x 10^3
Hope this helps