Which set of ordered pairs does not represent a function?
1 answer:
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Answer:
The first increase was of 60%.
Step-by-step explanation:
The initial value of the product is x.
The first increase was of y.
The second increase is of 25%, that is, 1.25.
The final price was double the original, so 2x.
This situation can be modeled by the following equation:
We want to find y.
Simplifying by x
After the first increase, the value was 1.6 of the original value, that is a increase as a percent of (1.6 - 1)*100 = 60%.
We will apply the "FOIL" method for multiplying two binomials. In this method you will:
- Multiply the First terms of each binomial
- Multiply the Outside terms of each binomial
- Multiply the Inside terms of each binomial
- Multiply the Last terms of each binomial
- Add all of the new terms you have just found together
The mathematical representation of the FOIL method is shown as:
Let's apply the FOIL method.
- The first two terms of each binomial are
and
. Multiplied together, we find the new term of
.
- The outside two terms are
. Multiplied together, these two terms are
.
- The inside two terms are
and
.
- The last two terms are
. Remember though that
, so our new term is actually
.
- Added together, we get:
.
Our final answer is .