Write an expression to represent the perimeter of 2a-3 and 2a and 3a+1

Adding all of the expressions together, (2a-3+2a+3a+1), would equal 7a-2. I hope my answer helps!

7a-2

Step-by-step explanation:

 to represent the perimeter of 2a-3 and 2a and 3a+1

The given sides are 2a-3 and 2a and 3a+1

To find out the perimeter we add all the sides

Now combine like terms to add the terms

2a+2a+3a becomes 7a

-3+1 is -2

Now the perimeter becomes

An expression to represents the perimeter is 7a-2

i got 142 as my answer

step-by-step explanation:

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6