Which of the sets of ordered pairs represents a function? a = {(1, −2), (3, −5), (5, 2), (7, 5)} b = {(4, 2), (4, −2), (9, 3), (9, −3)} only a only b both a and b neither a nor b

A function is a relation for which each value from the set the first components of the ordered pairs is associated with exactly one value from the set of second components of the ordered pair.

A = {(1, -2); (3, -5), (5, 2), (7, 5)} - it's a function

B = {(4, 2), (4, -2), (9, 3), (9, -3)} - it's not a function

the answer is  

a.

28 ft2

step-by-step explanation:

answer: 5 17/33 % (to the tenth)

step-by-step explanation:

he guessed: 34.5 pounds

actual weight is 32.7

there for he is off:

34.5 -32.7 = 1.8

32.7 is the 100%

1.8 represents %? of 32.7

therefore:

32.7   - 100%

1.8     -     x%

x= 1.8*100%/32.7% = 18*100%/327%

x=1800%/327%   = (5 165/327)%

to the tenth:

5 17/33 %