Answer:
a=29/42
Step-by-step explanation:
6a-1÷7=4
first write the division as a fraction
6a-1/7=4
add 1/7 to each side
6a=4+1/7
which is equal to
6a=29/7
divide both sides by 6
I don't know but 4 could be it
think it's A (0,6) if not then idk maybe D
Answer:4.31
no one of them has to be 90 degrees
