Answer: A. - 1/a
Step-by-step explanation:
Two lines are said to be perpendicular if the product of their slope equals -1 . That is , if the slope of the first line is 
and the slope of the second line is 
, if they are perpendicular , then :
x = -1.
Therefore : the perpendicular slope to m is 
Answer: H
Step-by-step explanation: H. Its H
Answer:
x=7.8
Step-by-step explanation:
take 49 degree as reference angle
using cos rule
cos 49=adjacent/hypotenuse
0.65=x/12
0.65*12=x
7.8=x
24=2*12
P=2*(l+L)
⇒ L+l=12
⇒ for a maximum area l=5, L=7
Area=5*7=35
