What is the y intercept y=3–4x choose 1 answer
1 answer:
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Step-by-step explanation:
Answer: B(8, -8 )
Step-by-step explanation: The formula for calculating mid - point between two points is given as :
M = ( ,
)
The mid point has been given from the question .
= -2
= ?
= 4
= ?
substituting into the formula , we have
(3 , - 2 ) = ( ,
)
Equating x -component to x and y component to y , we have
3 =
cross multiplying , we have
6 = -2 +
Therefore:
= 8
Also , equating y component to y , we have
-2 =
-4 = 4 +
= -8
Therefore :
= 8
= -8
check
-2 + 8 / 2 = 3 and
-8 + 4 / 2 = -2
Answer:
The half life of the radioactive substance is 277 hours.
Step-by-step explanation:
initial mass, No = 100 mg
mass decayed = 2% = 2 mg
Mass remained , N = 98 mg
time, t = 8 hours
Let the half life is T.
Use the equation of radioactivity