#### Answer

17 sq units

#### Work Step by Step

1. Use formula for area of a triangle A=$\frac{1}{2}$(base)(height) and find the area of all 3 triangles.
2. Use A=lw to find the area of the rectangle
3. Subtract the area found for all 3 triangles from the area of the rectangle. [(7$\times$5)-(0.5$\times$4$\times$6)-(0.5$\times$1$\times$5)-(0.5$\times$1$\times$7)] =35-12-2.5-3.5 =17 sq units