(-4, 1)
x = -4
y = 1
y > /x/ - 5
1 > /-4/ - 5
1 > 4 - 5
1 > -1
Therefore the answer is (-4, 1)
Answer:
20000
Step-by-step explanation:
you do 5 plus 5 then add it to 10
then u get 200 which u times it by 100
If
|a|=b
assume
-a=b and
a=b
|3x-4|=5
assume
3x-4=5 and
-3x+4=5
solve each
3x-4=5
add 4
3x=9
divdide 3 both isdes
x=3
-3x+4=5
minus 4
-3x=1
divide -3
x=-1/3
x=-1/3 and 3
Answer:
a) The half life of the substance is 22.76 years.
b) 5.34 years for the sample to decay to 85% of its original amount
Step-by-step explanation:
The amount of the radioactive substance after t years is modeled by the following equation:
In which P(0) is the initial amount and r is the decay rate.
A sample of a radioactive substance decayed to 97% of its original amount after a year.
This means that:
Then
So
(a) What is the half-life of the substance?
This is t for which P(t) = 0.5P(0). So
The half life of the substance is 22.76 years.
(b) How long would it take the sample to decay to 85% of its original amount?
This is t for which P(t) = 0.85P(0). So
5.34 years for the sample to decay to 85% of its original amount
28 is the coefficient and the simplified expression is 28x + 35