I need help with number two
2 answers:
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recall d = rt, distance = rate * time.
let's say airplane A is going at a rate of "r", therefore airplane B is moving faster, at a rate of "r + 80".
now, after 3 hours, both planes have been travelling for 3 hours each, and say if A has covered "d" miles, then B has covered the slack of 2490 - d.
If each pizza dough needs 1 
\\
We will need to multiply 9 x 1\\
we will turn the fraction into a mixed fraction and we'll end up with
\\
We multiply 9 x
and we end up with
The cook need 12 cups of flour.
We will need to multiply 9 x 1
we will turn the fraction into a mixed fraction and we'll end up with
We multiply 9 x
and we end up with
The cook need 12 cups of flour.