A certain bacteria population is known to doubles every 30 minutes. Suppose that there are initially 80 bacteria. What is the si
1 answer:
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Answer:
E)
Step-by-step explanation:
Group the similar terms together:
Add/subtract the "a" terms:
Add/subtract the "b" terms:
Add/subtract the numbers:
B can be eliminated, as 10x and 4x multiply to 40x^2, which is not in the expression.
The greatest common factor of all coefficients in the equation is 2. Divide all coefficients by 2 to get the following equation:
We will leave out this coefficient, 2, for now.
We'll need to find the factors of c:
c = -6
Factors of 6: {1,2,3,6}
The only factors in the answer choices that fit this are 2 and 3. D can be eliminated.
5x and 2x multiply to 10x^2. 5x and 2x also modify what b will equal. Use the answer choices A and C to find b:
A.
C.
Answer C comes up with the correct b value.
The answer is C. 2(5x - 2)(2x + 3).
The greatest common factor of all coefficients in the equation is 2. Divide all coefficients by 2 to get the following equation:
We will leave out this coefficient, 2, for now.
We'll need to find the factors of c:
c = -6
Factors of 6: {1,2,3,6}
The only factors in the answer choices that fit this are 2 and 3. D can be eliminated.
5x and 2x multiply to 10x^2. 5x and 2x also modify what b will equal. Use the answer choices A and C to find b:
A.
C.
Answer C comes up with the correct b value.
The answer is C. 2(5x - 2)(2x + 3).