Question

jennys backyard has cement and grass. find the area of the part with cement. (sides meet at right angles.)

Explanation:

Step1: Calculate total backyard area

The backyard is a rectangle with length $7$ m and width $5$ m. The area of a rectangle is $\text{length} \times \text{width}$.
$$7 \times 5 = 35 \text{ square meters}$$

Step2: Calculate grass area

The grass is a square with side length $4$ m. The area of a square is $\text{side} \times \text{side}$.
$$4 \times 4 = 16 \text{ square meters}$$

Step3: Find cement area

Subtract grass area from total area.
$$35 - 16 = 19 \text{ square meters}$$

Answer:

19 square meters