The perimeter of the rectangle is 34 cm. The perimeter of the triangle is 30 cm.

a. 5cm

Step-by-step explanation:

r. m+m+n+n= 34

t. m+n+n+1=30

r. 2m + 2n =34

t. m + 2n + 1 = 30

after multiple by negative t row

t. -m -2n -1 = -30

and combine the 2 rows

2m -m +2n - 2n -1 = 34 - 30

m - 1 = 4

and we add one to each side of the operation

m - 1 + 1 = 4 + 1

m = 5

980

Step-by-step explanation:

Here is your answer :-

➡ 49 × 17 + 49 × 3

➡ 49 ( 17+3 )

➡ 49 × 20

➡ 980

Answer : 980

Hope it will help you !!!