Ok so first you move them together so:
9x-3x=-36
6x=-36
x=

Then divide to get: -
6
Your answer would be
A
Answer:
7y²
Step-by-step explanation:
First u group them like 4+3+y+y=7y²
Answer:
Population of bacteria at time
is 
Step-by-step explanation:
The complete question is
If
represents the number of bacteria in a culture at time t, how many will there be at time 
Solution
Given
The population of bacteria after time t is equal to 
Population when at time 
We will substitute the value of time in above equation.

Answer is A.
step 1 , 16 was not multiplied by 9
should be
54x - 9y = 144
If each case weighs 24 pounds, then 1p=24 pounds. so if we're trying to find a function of weight, p=24c.
Example: When you have 2 cases, you plug in a 2 for c
p=24c
p=24(2)
p=48
So if you have two cases, it will total 48 pounds,
So that is why the equation is p=24c. Hope this helps!