The perimeter of a rectangle is 230 feet. the short sides are each 30 feet long, but the lengths of the long sides are unknown. which equation represents this situation?
30+2a=230
2(30)+2a=230
2(30)a=230
30a=230

For this case we have that by definition, the perimeter of a rectangle is given by:

Where:

a: It is the length of the rectangle

b: It is the width of the rectangle

We have as data that:

Then, replacing we have:

Option B

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this

25

step-by-step explanation: