Question

answer this question​

Answer 1

Step-by-step explanation:

1st answer 0

2nd answer 9/4 or 2¹/9

Answer 2

Answer:

1. 16/21

2. 9/4

3. 125/16

4. 37/4

Step-by-step explanation:

1. ?-8/21=8/21

= 8/21+8/21

= 16/21

2. 15/4-3/2

= 15/4-6/4

= 9/4

3. 11/4+13/8+55/16

= 44/16+26/16+55/16

= 125/16

4. 8/1+7/2-9/4

= 16/2+7/2-9/4

= 23/2-9/4

= 46/4-9/4

= 37/4