The sides of a triangular plot are in the ratio of 3 : 5 : 7 and its perimeter is 300 m. find its area. (use 3 = 1.73)
pls

2598 units²

Step-by-step explanation:

Sum the parts of the parts of the ratio 3 + 5 + 7 = 15 parts

Divide the perimeter by 15

300 ÷ 15 = 20 ← value if 1 part, thus sides of triangle are

3 × 20 = 60

5 × 20 = 100

7 × 20 = 140

Using Hero's formula to calculate the area

A =

where s is the semi perimeter and a, b , c are the sides of the triangle

s = 300 ÷ 2 = 150

let a = 60, b = 100 and c = 140, then

A =

   =

   = ≈ 2598 units²

21

step-by-step explanation:

11279

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer