What your doing is setting up a proportion that of the windows(18x11) dimensions and the buildings(108xW) dimensions.
So it would be 18/11=108/x
you would cross multiply so you would have 11x108 (1188)= 18x
Divide by 18 so x=66
The midpoint between the two points are (0,1/2)
Is should be c and a if not just c
Answer:
She could teach 3 lessons a night
Step-by-step explanation:
Because 1 1/2 goes into 4 1/2 3 times