Question

I don't know this please help give brainlest

Answer 1

Answer:

-20 + 3m + 6k

Step-by-step explanation:

Given,

Sides of the triangle = (5k-7) cm, (k-4) cm and (3m - 9) cm

Therefore,

Perimeter of the triangle in cm = (5k -7) cm + (k-4) cm + (3m - 9) cm

= 5k - 7 + k - 4 + 3m - 9

= 5k + k -7 - 4 - 9 + 3m

= 6k -20 + 3m

= - 20 + 3m + 6k

Hence,

-20 + 3m + 6k is the perimeter of the triangle in cm.

Answer 2

Answer:

-20+3m+6k

Is the required answer.