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.
Answer:
45°
Step-by-step explanation:
3x + 4x + 5x = 180° **
12x = 180° / :12
x = 15°
m<A = 3×15 = 45°
** There is a law that the sum of all the angles in a triangle is equal to 180°