They are perpendicular because when you change 2x+8y=16 to slope intercept form it becomes y= -1/4x+2 and the slope (-1/4) is the negative reciprocal of 4, which is the slope for your other equation.
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Answer: f=gx/x-8
Step-by-step explanation:
Let's solve for f.
gx=f(x−8)
Step 1: Flip the equation.
fx−8f=gx
Step 2: Factor out variable f.
f(x−8)=gx
Step 3: Divide both sides by x-8.
f(x−8)
x−8
=
gx
x−8
f=
gx
x−8
Answer:
To find : If 21m, 28m and 49m form a right angle or not.
Logic : To find if this triangle is a right angle, we can use the Pythagoras Theorem, which states that the square if the longest side should be equal to the square of the sum of the other two sides.
The name of the longest side is called the hypotenuse, while the others are called legs or one is the perpendicular and the other the base.
Proof : 
=> 
=> 2401 = 784 + 441
=> 2401 ≠ 1225
Therefore these side lengths cannot be the lengths of a right angled triangle.
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Answer is C
factor the quadratic and get (x+8)(x-1)=0
then use the 0 product property