Question

If the length of a rectangle in terms of x is 5x2 + 3x + 6, and its width is 7x +

9, what is the perimeter of this rectangle? Don't leave any spaces in your
solution.
Perimeter:_ units
A.20x2+20x+30
B.10x5+20x+30
C.10x2+2x+3
D.10x2+20x+30
​

Answer 1

Answer: 10x²+20x+30

Explanation:

formula of perimeter of rectancle=2(l+b)

put values

2(5x²+3x+6+7x+9)

2(5x²+10x+15)

2(5x²)+2(10x)+2(15)

10x²+20x+30