Answer these two before 1: 20 pm ! !

21. D

22. A

Step-by-step explanation:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

the answer would be 1 1/72

step-by-step explanation:

you can rewrite the equation by separating the parts and then solving individually:

10-9=1

1/8 - 1/9=

find l c d and then combine:

1 1/72