Answer:
Angles B and H= Alt exterior angles
Angles D and C= Adjacent angles
Angles B and F= Corresponding angles
Angles C and E= Alt interior angles
y = x² - 4x + 8
4x + y = 12
4x + y = 12
4x + (x² - 4x + 8) = 12
x² + 4x - 4x + 8 = 12
x² + 8 = 12
- 8 - 8
x² = 4
x = ±2
4x + y = 12
4(2) + y = 12
8 + y = 12
- 8 - 8
y = 4
4x + y = 12
4(-2) + y = 12
-8 + y = 12
+ 8 + 8
y = 20
(x, y) = (2, 4) and (-2, 20)
Jus plug 'em in & use PEMDAS
-7 - 8*7 => -7 - 56 => -7 + -56= -63
I believe -63 would be the final answer
2/3 girls that's mean there is 1/3 boys.
If there are 18 girls that mean half this number is the boys which is 9.
Therefore, total number is 27.