I believe it is asking for the same number basically written 3 different ways, so it could be 1 1/2, 6/4 and 1.5 because those are all the same number
Step-by-step explanation:
put it in least to greatest and then put your fingers on the opposite side of the numbers and count down at the same time
Make a proportion to get the answer the proportion will be

to give you the answer of 37.5
-20+1= -19
-19/2= -9.5
Check:
-9.5x2= -19
-19-1= -20
Answer:

Step-by-step explanation:
the other 3 are perfect squares and have rational answers.
