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hilllz4793
03.07.2021 •
Mathematics
Find the slope of the line that passes through (1, 2) and (8, 8).
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Ответ:
slope =![\frac{6}{7}](/tpl/images/2418/1629/f36a0.png)
Step-by-step explanation:
Calculate the slope m using the slope formula
m =![\frac{y_{2}-y_{1} }{x_{2}-x_{1} }](/tpl/images/2418/1629/287b9.png)
with (x₁, y₁ ) = (1, 2) and (x₂, y₂ ) = (8, 8)
m =
= ![\frac{6}{7}](/tpl/images/2418/1629/f36a0.png)
Ответ:
Part A) The correct Expression : (1.05)(190)(0.8)
=> The error of Joel was that instead of adding the sales tax, he subtracted it.
Part B) $159.60
Step-by-step explanation:
Part A:
To calculate the computer cost, we need to find out the selling price first.
There's a discount of 20% so the selling price will be 100% - 20% = 80% =>80/100 = 0.8
So, We'll multiply the cost price by 0.8
=> (190)(0.8)
But, there is a sales tax of 5%
So, the selling price with cost price will be:
=> 100% + 5% = 105% => 105/100 = 1.05 (We'll multiply this too with the first equation that we made above)
So, the expression will be:
=> (1.05)(190)(0.8)
The error of Joel was that instead of adding the sales tax, he subtracted it.
Part B)
Joel will pay for the tablet:
=> (1.05)(190)(0.8) [We used the above expression]
=> $159.60