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salantis [7]
3 years ago
7

Help with rational equations

Mathematics
1 answer:
Sunny_sXe [5.5K]3 years ago
7 0
Change all the terms so that they have a common denominator
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If f(x) = g(x+1) and g(x) = x^2, find the value of f(3).
Elena-2011 [213]

\bf \begin{cases} f(x)=&g(x+1)\\ f(3)=&g(3+1)\\ &g(4)\\[-0.5em] \hrulefill& \hrulefill\\ g(x)=&x^2\\ g(4)=&4^2\\ &16 \end{cases}\qquad \qquad f(3)\implies g(4)\implies 16

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3 years ago
Find the slope given the two points. (2, -6) and (2, 3)
kifflom [539]

Answer: Undefined

The x coordinates are the same, so a vertical line forms. All vertical lines have undefined slopes.

We can see it through the slope formula

m = (y2-y1)/(x2-x1)

m = (3-(-6))/(2-2)

m = (3+6)/(2-2)

m = 9/0

We cannot divide by zero, so the result is undefined.

5 0
3 years ago
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3 years ago
Francis can buy 7 shirts for $42 or 8 shirts for $48. How much will she pay for nine?
Delvig [45]

Answer:

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Step-by-step explanation:

42/7=6\\48/8=6\\x/9=6\\x=54

Hope this helped :D

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