What do i do to start this problem.
for #4

Well there is 1 girl for every 5 boys so you could add 1 + 5 to get 6, and divide the total students by 6 to get 38 girls.

Divide the 228 by 5 and you should get 45.6 or rounding, 46

So, there were 46 girls and 182 boys.

You can check by multiplying 46 by 5 and you will get 228

Hope this helped

Based on the angle pair relationships and the triangle sum theorem, the empty blanks will be filled with the digits as shown in the attached diagram.

Triangle Sum TheoremThe sum of the interior angles of any triangle will always give us 180 degrees.The sum of two interior angles in a triangle equals the external angle that is directly opposite the interior angles.Linear pairs equals 180 degrees.

Thus, based on the angle pair relationships and the triangle sum theorem, the empty blanks will be filled with the digits as shown in the attached diagram.

Learn more about triangle sum theorem on:

link