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disa [49]
2 years ago
11

What is the inverse of y=2x squared -4

Mathematics
1 answer:
Bumek [7]2 years ago
6 0
y=2x^2-4\ \ \ |+4\\\\2x^2=y+4\ \ \ |:2\\\\x^2=\dfrac{y+4}{2}\\\\x=\sqrt{\dfrac{y+4}{2}}

y^{-1}=\sqrt{\dfrac{x+4}{2}}=\dfrac{\sqrt{x+4}}{\sqrt2}=\dfrac{\sqrt{2(x+4)}}{2}=\dfrac{\sqrt{2x+8}}{2}
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Answer:

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2 years ago
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2 years ago
Carlos is helping his grandmother make a rug.They have 5 yards of fabric,which is equal to 180 inches.They need an additional of
lesya692 [45]

Answer:

162 inches.

Step-by-step explanation:

Please consider the complete question.

Carlos is helping his grandmother make a rug. They have 5 yards of fabric, which is equal to 180 inches. They need an additional of 4 1/2 yards of fabric to finish the trim. How many inches are in 4\frac{1}{2} yards?

Let us convert 4\frac{1}{2} into improper fraction as:

4\frac{1}{2}=\frac{4\cdot 2+1}{2}=\frac{8+1}{2}=\frac{9}{2}

Now, we will use proportions to solve our given problem as:

\frac{\text{Inches}}{\text{Yard}}=\frac{180}{5}

\frac{\text{Inches}}{\text{Yard}}=36

1\text{ Yard}=36\text{ Inches}

To find number of inches in 9/2 yards, we will multiply 9/2 by 36 as:

\frac{9}{2}\text{ Yards}=\frac{9}{2}\times 36\text{ Inches}

\frac{9}{2}\text{ Yards}=9\times 18\text{ Inches}

\frac{9}{2}\text{ Yards}=162\text{ Inches}

Therefore, there are 162 inches in 4\frac{1}{2} yards.

5 0
3 years ago
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mote1985 [20]

Answer:

Zero.

Step-by-step explanation:

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marusya05 [52]
The red one y=6.50x-0.75
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