Which of the following lists of ordered pairs is a function?

B. (2,5) , (3,6) , (6,9)

Step-by-step explanation:

In ordered pair , the x coordinate shows the input value and the y-coordinate shows the output value.

In the given lists only list B is representing  a function since each input corresponds to a unique output.

In list A. , 2 corresponds to two different values i.e. 5 and 1 .

Thus its not a function.

In list C., 2 corresponds to two different values i.e. 5 and 3 .

Thus its not a function.

In list D. 4 corresponds to two different values i.e. 0 and 3 .

Thus its not a function.

1 is c

2 is a

3 is a

step-by-step explanation:

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet