Answer:djd
Step-by-step explanation:weljfnw
The expression which represents the perimeter, in centimeters, of the rectangle is; (18d +10f) centimetres.
<h3>Perimeter of a rectangle</h3>
Since the perimeter of a rectangle is given by the formula;
In essence, Perimeter, P = 2(2d – 3f) + 2(7d + 8f)
Ultimately, the perimeter of the rectangle is; (18d +10f) centimetres.
Read more on perimeter of a rectangle;
brainly.com/question/17297081
Group 17. They combine with alkali metals and form salt, the are reactive, they have 7 electrons in their outer energy level