Me the question says to write down a subtraction problem where two positive numbers are subtracted to obtain -9

To obtain 9 let's go with

6 - (-3)

To obtain -9 we can just reverse:

-3 - 6

probability for j is 1/4

while

a is 1/6

hello :

by applying the distributive property :

6 × 4.3 = 6 × ( 4 + 0.3 )

            =   (6 ×   4) + (6 ×   0.3)

            = 24 + 1.8

6 × 4.3 = 25.8