Please help I need it a lot this test is very important

it is the third one

Step-by-step explanation:

it is the third one

1. 4

2. 35

3. Her yard is a rectangle. She needs a 3000 feet of fence.

Step-by-step explanation:

1. The length of one side is 5 - 3 = 2 (subtract the y values)

The length of the other side is 7 - 3 = 4 (subtract the x values)

So the area is 2*4 = 8

2. The length of one side is 6 - 3 = 5  (subtract the x values)

The length of the other side is 7 - 0 = 7 (subtract the y values)

So the area is 5 * 7 = 35

3. The shape of her yard is a rectangle.  

The length of one side of the fence is 5 - 0 = 5 units (subtract the x values)

The length of the other side of the fence is 10 - 0 = 10 units (subtract the y values)

The perimeter would be

(2*5) + (2*10)

= 30 units

Since the distance between each unit plotted is 100 feet, the total amount of fence needed would be

30 * 100

= 3000 ft