Question

o

Answer 1

yes
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Answer 2

you need to subtract 4 first and start with \[|2a+9|=1\]

Answer 3

so \[2a+9=1\\
2a=-8\\
a=-4\] for one answer, yes

Answer 4

for the other answer \[2a+9=-1\\
2a=-10\\
a=-5\] looks like you got both

Answer 5

looks like you got this

Answer 6

oooo
i got one
see if you can solve
|y-6|=-2

Answer 7

weird little bracket thingies are the way math people say
"the set of all x such that x is greater than one or x is less than minus three "
more terse that way