Question

Find the area of the rectangle or triangle.

Short answer

Area of rectangle $=5x+15$ square units.

Step-by-step solution

Step-1-Formula for area of rectangle

Area of rectangle $=length\times breadth$.

From given information,

Length of rectangle $=x+3$.

Breadth of rectangle $=5$.

Step-2-Substituting given values

On substituting given values, it gives,

Area of rectangle $=\left(x+3\right)\times 5$.

Area of rectangle $=5\left(x\right)+5\left(3\right)$.

Area of rectangle $=5x+15$.

Step-3-Conclusion

Therefore, the area of rectangle $=5x+15$square units.