tony buys a pair of running shoes for $80. he pays 9% sales tax. How much does the pair of running shoes cost in total.
1 answer:
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Answer:
See below.
Step-by-step explanation:
So we started off with the equation:
And we subtracted x from both sides to acquire:
Now, this is essentially slope-intercept form. Recall that the slope-intercept form is:
Where m is the slope and b is the y-intercept.
If we rearrange our equation:
And put some parentheses:
We can see that this is indeed slope-intercept form.
And we can see that m is -1 and b is 2.
In other words, the slope is -1 and the y-intercept is 2.
Answer:
first and third
Step-by-step explanation:
Consider
y = x + 3 ( multiply through by 2 )
2y = x + 6 ← third equation