How many cents do 4 bookmarks cost
1 answer:
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Answer: The second number is 26
Step-by-step explanation:
To solve this problem you must apply the proccedure shown below:
1. Let's call:
x: The first even number.
x+2: the second consecutive even number.
x+4: the third consecutive even number.
2. So, you know that the sum ot the 3 consecutive numbers is 78, therefore, you must add them, as you can see below:
3. Substitute the value obtain into x+2. Therefore, the second number is:
Step-by-step explanation:
- Just apply the quadratic formula
- Your equation is
- Every quadratic equation follows the general form
- In this case
- Substitute into the quadratic formula:
Now take note that the square root of any number gives a (+) and (-) result, so two different answers
are the answers