Which sets of ordered pairs represent relations that are functions? you may choose more than one correct answer.
{(1, 0), (2, 0), (3, 0), (4, 0)}
{(2, 3), (2, 4), (2, 5), (2, 6)}
{(1, 1), (2, 2), (3, 3), (4, 4)}
{(1, 3), (-1, 4), (1, 4), (-1, 3)}
{(6, -6), (-6, 6), (5, -5), (-5, 5)}

Step-by-step explanation:

A relation from a set X to a set Y is called a function, if each element of X is related to one and exactly one element in Y. Though many elements of X can be related to one element in Y (many to one).

As in the second option all the values of Y are related to one X i.e 2, so this is not a function.

In 4th option there are two points (1, 3), (1, 4) and (-1, 4), (-1, 3), they share same value from X, so this is not a function.

Option 1, 3, 5 are correct.

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus