The answer for this question is 59
7a+16-3a-7= -11
combine like terms
4a+9= -11
add -9 to both sides
4a = - 20
divide by 4
a= -5
hope this helps
Answer:
56m
Step-by-step explanation:
First calculate the perimeter of the sheep pen.
The perimeter is all the side lengths added together.
The rectangle has two sides that are 5m long and two sides that are 9m long.
5 + 5 + 9 + 9 = 28m
Now that you know the perimeter of the sheep pen you can double it by multiplying by 2 to find tha perimeter of the cow pen.
28 * 2 = 56m
Divide it by -1 to get positive 81
