The perimeter of the rectangle is 34 cm. The perimeter of the triangle is 30 cm. Find the value of m. a. 5 cm
b. 6 cm
c. 7 cm
d. 8 cm

Please select the best answer from the choices provided

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

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!