Answer: OPTION C.
Step-by-step explanation:
Given a System of equations, you can use the Elimination Method to solve it by transforming the system in order to cancel out one of the variables. But first, the terms of both equations must be written in the same order.
To cancel out one of the variables, the coefficients must be opposites, which means that one must be positive and the other one must be negative.
Given the following System of equations:

You can notice that the order of the terms is not the same, so, if you want to use the Elimination Method to solve the system of equations, the first step you must apply is to rewrite the equations so like variable terms are in the same order.
Then:

Answer:
1 2/3
Step-by-step explanation:
Answer:
81 times the original size
Step-by-step explanation:
AA0ktA=3A0=?=?=25hours=A0ekt
Substitute the values in the formula.
3A0=A0ek⋅25
Solve for k. Divide each side by A0.
3A0A0=e25k
Take the natural log of each side.
ln3=lne25k
Use the power property.
ln3=25klne
Simplify.
ln3=25k
Divide each side by 25.
ln325=k
Approximate the answer.
k≈0.044
We use this rate of growth to predict the number of bacteria there will be in 100 hours.
AA0ktA=3A0=?=ln325=100hours=A0ekt
Substitute in the values.
A=A0eln325⋅100
Evaluate.
A=81A0
At this rate of growth, we can expect the population to be 81 times as large as the original population.