Answer: (b)
Step-by-step explanation:
Given
Function for bill calculation is
The consumption is 700 kWh i.e. more than 200
Therefore, bill is given by the second function i.e.
Substitute 700 for x to get the bill
Hence, option (b) is correct.
Write the expression that represents 7 subtracted from 8n.
2 answers:
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Answer:
632
Step-by-step explanation:
So we can define decreasing x% in two ways: we can define 20% off as 80% of the original value, or we can define subtracting 20% from the original value, and both representations are useful.
In this case it's more useful to define 20% as subtracting 20%, from the original value. The reason for this, is because since we're subtracting 20% of the original value, we then know that 126.40 is 20% the original value.
So to find x% of some value, you generally use the following equation: where A=original amount, and x is the percent. This equation is simply converting the x% to a decimal value. Since 126.40 is 20%, we can derive the following equation.
We can solve for A, by dividing by 0.20
It's also important to note, you didn't really have to set up this entire equation, since you know that the 126.40 is 20%, you simply could've multiplied by 5, since 20% is really just 1/5 of the entire value, so get the entire value, or original value you multiply by 5