Value of f(4) is
given 
Step-by-step explanation:
We are given
and we need to find value of f(4)
Solving:
We will put x=4 and solve the given equation:


We know (4)^2=16


So, Value of f(4) is
given 
Keywords: Solving Equations
Learn more about Solving Equations at:
#learnwithBrainly
The line to find: y = mx + b
the line perpendicular to y= 2/5x+6/6 so it has the slope m × 2/5 = -1
thus the slope m = -5/2
the line passes through the point (-2,6) so:
6 = (-5/2)×(-2) + b so b = 1
the equation of the line is y = -5/2x +1