Answer:
Step-by-step explanation:
C.21
5^2-4=21
Explanation
The slope of the parallel line is -6/7
the slope of the perpendicular line is 7/6
the slope of the line = -6/7
the gradient of two parallel lines are equal
the product of the gradient of two perpendicular lines is -1
: the gradient m1*m2 = -1
m2= -1(-6/7)
m2= 7/6
Answer:
30 more students
Step-by-step explanation:
690 + 30 = 720
720 / 9 = 80
