Answer:
The 1st one
Step-by-step explanation:
Answer:
I think A hope I helped good luck
Answer:
400%
Step-by-step explanation:
Answer:
1. 
2. 
3. 
Step-by-step explanation:
The equation of the line that passes trough the points A(14,-1) and B(2,1) is

The y-intercept of this line is

Line BC is perpendicular to line AB, then its slope is
Line BC passes through the point B, so

If the y-coordinate of point C is 13, then x-coordinate is

Answer- 240 students
Explanation-multiply the amount of girls by two because they make up 50% of the school.