Question

eorge is building a fence around a rectangular dog run. He is using his house as one side of the run. The area of the dog run will be 240 square feet. The length of the run is 30 feet, and the width is (30 minus x) feet. The diagram below shows his plan.

Recall the formulas for area and perimeter: A = lw and P = 2l + 2w.


How many feet of fencing will George need for the dog run?
22 feet
68 feet
76 feet
82 feet

Answer 1

help meh;(

Answer 2

We need to figure out what the width is before we can get the final answer.

Can you write an equation using the information they gave you?

Answer 3

Area = length * width

Plug in what they gave you already.

Answer 4

240x30

Answer 5

no

Answer 6

They told you

area is 240
length is 30
width is 30 - x

Can you plug that in to

Area = length * width

Answer 7

76 would be the answer

Answer 8

is that a statement or a question

Answer 9

question

Answer 10

Can you show me how you got to that answer?

Answer 11

yes

Answer 12

30 +30=w=
w=p
240 square feet = area
divide 240

Answer 13

30+8+8

Answer 14

okay... keep on going

Answer 15

30+30+8+8

Answer 16

i mean

Answer 17

p=76

Answer 18

8-76=68

Answer 19

okay, so there's a few problems with all that- it doesn't make sense and it's wrong

Answer 20

Let's start from the beginning again, shall we?

Answer 21

ok

Answer 22

Do you understand the formula for area?

Area = Length * Width

Answer 23

length x width

Answer 24

Okay good, and what is the width? What does the question say the width is?

Answer 25

i have to go sorry

Answer 26

No worries

Answer 27

thank you anyways

Answer 28

\(\color{#0cbb34}{\text{Originally Posted by}}\) @AZ
They told you

area is 240
length is 30
width is 30 - x

Can you plug that in to

Area = length * width
\(\color{#0cbb34}{\text{End of Quote}}\)

You just have to plug in the information they gave you.

You'll get

240 = 30 * (30-x)

Can you distribute the 30?

Remember the rule:
a(b-c) = (a*b) - (a*c)

Answer 29

Also keep in mind that the fence you're building has only three sides because one side borders the house.