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legendman27
07.10.2019 •
Mathematics
Ted bought a new book for $20.00. if the sales tax was 8%, how much did ted play in all for the books?
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Ответ:
Ответ:
C
Step-by-step explanation:
If a function passes both the vertical line test (so that it is a function) and the horizontal line test (so that its inverse is a function), then the function is one-to-onefunction and has an inverse function.
A.![b(x)=x^2+3](/tpl/images/0212/1481/7b2fc.png)
The graph of this function is a parabola. Each vertical line crosses it at exactly one point, but horizontal lines can cross it at two points.
B.![d(x)=-9](/tpl/images/0212/1481/d748c.png)
This is not a function, because h=the vertical line y=-9 crosses it at infinitely many points.
C.![m(x)=-7x](/tpl/images/0212/1481/28182.png)
Both vertical and horizontal lines cross the graph of this function at exactly one point. So, this function has an inverse
D.![p(x)=|x|](/tpl/images/0212/1481/ed13b.png)
Each vertical line crosses it at exactly one point, but horizontal lines can cross it at two points.