The number of bacteria at any time t where t is number of hours is given by the equation,
At = Ao(1/2)^t/4
where Ao is the original number of bacteria. Substituting the known values from the equation,
1500 = (75000)(0.5)^t/4
The value of t from the equation is equal to 22.57 hours.
7x + 9y = - 27_________eq1
3x - y = 3__________eq2
Multiply eq 2 by 9 and then add the resulting eq with eq1.
eq2 x 9 gives us 27x - 9y = 27___________eq3
add eq3 with eq1 we get.
34x = 0.
where x=0/34
x=0.
substitute x into any of the above equations to get y.
substitute x into eq1. we get:
7(0) + 9y =-27
9y = -27
y= -27/9
y = -3.
Answer:
This is an improper fraction so we need to make it a mix fraction.
Step-by-step explanation:
21/10 = 10/10+10/10+1/10
10/10=1
So your final answer will be 
