Using the formula sum of interior angles {180(n-2)}
180(15-2)=180
giving you a total of 2340 Degrees
The answer is 7 cups of water are needed for 21 cups of flour.
Shown work:
1 cup of water=3 cups of flours
? Cup of water=21 cups of flours
21 divided 3=7
1 multiply by 7= 7 cups of water needed
23-34=12 is because I need the answer to be correct that I’m not mad