Answer:
27
Step-by-step explanation:
(30)-4+2-1
30-4= 26
26+2=28
28-1=27
The answer and the process is shown in the following picture
Taking that the width is x
width: x cm
length: (x+6)cm
perimeter:

hence,

therefore, x=20
hence, since the width is 20cm, the length would be 26cm
Answer:
32 is the other number
think about it if you add
32+7 that is = to 39
The number on top of sigma is the number of terms.
The answer is C. 8 terms.