At first you have 1 and then 1 and 1 and you know that 1+1=2 so you have 1, 2, 1, and then you know that 1+2=3 and 2+1=3 so yu have 1,3,3,1 and then you know that 1+3=4 and 3+1=4 so you have 1,4,4,1 and it goes like that until the end.
10(7g-9h)-4h-8(-h+8g)
solve for g
7g + 8g since both are positive
15g
solve for h
9h+4h since both are negative
-14h
10-8 since the 8 is negative
12
12(15g-14h)
Since you typed the same equation twice I didn’t know if you meant to , so if it was meant to be doubled it would be
4(30g-28h)
7.3 km/y
at least if i did this correctly but that's always a stretch.
because it takes 50 days to complete a km
so 365/50 = 7.3