Match the expressions to their solutions or equivalents. -1/9 / (-1/3)
1 answer:
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Answer:
B and D
Step-by-step explanation:
to calculate the slope m use the gradient formula
m = ( y₂ - y₁ ) / ( x₂ - x₁ )
(4)
with (x₁, y₁ ) = (0, - 4) and (x₂, y₂ ) = (3, - 1) ← 2 points from table
m = =
= 1 → B
(5)
with (x₁, y₁ ) = (- 1, - 4) and (x₂, y₂ ) = (2, 5) ← 2 points from table
m = =
= 3 → D
First lets rearrange the formula to solve for half-life.
The half-life is the time it takes for half of the element to decay.
So now we need to find "r" which is the rate of decay.
If we rearrange formula to solve for r:
Substituting this into equation for half-life, you get:
The half-life is the time it takes for half of the element to decay.
So now we need to find "r" which is the rate of decay.
If we rearrange formula to solve for r:
Substituting this into equation for half-life, you get: