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4 years ago

1. A 2. B 3.C 4.D which one ??

Mathematics

1 answer:

Montano1993 [528]4 years ago

6 0

Answer:

Step-by-step explanation:

the answer should be a because the distance formula is basically a copy of the Pythagorean theorem

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Simplify -(7)+(-6)+5(-2)-3

Illusion [34]

$\large\textsf{-(7) + (-6) + 5(-2) - 3 }$

$\large\textsf{-7 - 6 = -13}$

$\large\textsf{-13 + 5(-2) - 3}$

$\large\textsf{5(-2) = -10}$

$\large\textsf{-13 - 10 = -23}$

$\large\textsf{-23 - 3}$

$\large\textsf{= -26}$

$\boxed{\boxed{\large\text{Answer: \huge \bf -26}}}\huge\checkmark$

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8 0

3 years ago

Read 2 more answers

An equation of a hyperbola is given.

siniylev [52]

Answer:

The vertices are $\left(3,\:0\right),\:\left(-3,\:0\right)$ .

The foci are $\left(3\sqrt{5},\:0\right),\:\left(-3\sqrt{5},\:0\right)$ .

The asymptotes are $y=2x,\:y=-2x$ .

b) The length of the transverse axis is 6.

c) See below.

Step-by-step explanation:

$\frac{\left(x-h\right)^2}{a^2}-\frac{\left(y-k\right)^2}{b^2}=1$ is the standard equation for a right-left facing hyperbola with center $\left(h,\:k\right)$ .

The vertices $\:\left(h+a,\:k\right),\:\left(h-a,\:k\right)$ are the two bending points of the hyperbola with center $\:\left(h,\:k\right)$ and semi-axis a, b.

Therefore,

$\frac{x^2}{9}-\frac{y^2}{36}=1$ , is a right-left Hyperbola with $\:\left(h,\:k\right)=\left(0,\:0\right),\:a=3,\:b=6$ and vertices $\left(3,\:0\right),\:\left(-3,\:0\right)$ .

For a right-left facing hyperbola, the Foci (focus points) are defined as $\left(h+c,\:k\right),\:\left(h-c,\:k\right)$ where $c=\sqrt{a^2+b^2}$ is the distance from the center $\left(h,\:k\right)$ to a focus.

Therefore,

$\frac{x^2}{9}-\frac{y^2}{36}=1$ , is a right-left Hyperbola with $\:\left(h,\:k\right)=\left(0,\:0\right),\:a=3,\:b=6$ $c=\sqrt{3^2+6^2}= 3\sqrt{5}$ and foci $\left(3\sqrt{5},\:0\right),\:\left(-3\sqrt{5},\:0\right)$

The asymptotes are the lines the hyperbola tends to at $\pm \infty$ . For right-left hyperbola the asymptotes are: $y=\pm \frac{b}{a}\left(x-h\right)+k$