The answer to #1...hope this helps
Answer:
data about a person's heartbeat, perspiration levels, respiration, and body movements.
Step-by-step explanation:
the answer to the question is that
biometric measures are useful for evaluating data like that of heartbeat, perspiration levels, respiration, body movements of a person.
Biometrics is useful for the evaluation of the physical characteristics of a person. such a measure is for authentication and security identification. the system gives allowance for certain features of a person to be recognized using biometric data and also algorithm.
Given pair of lines are x² + 4xy + y² = 0
⇒ (y/x) ² + 4 y/x + 1 = 0
⇒ y/x = -4±2√3/2 = -2±√3,
∴ The lines y = (-2 + √3) x and y = (-2 - √3) x and x - y = 4 forms an equilateral triangle
Clearly the pair of lines x² + 4xy +y² = 0 intersect at origin,
The perpendicular distance form origin to x - y = 4 is the height of the
h = 2 √ 2
∵ Area of triangle = h²/√3 = 8/√3
The thing that is true about -5 and 5 is the answer is zero.
