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3 years ago

Is 4/7 a real number

2 answers:

7 0

Yes it is a real number. All numbers including 0 are real except for roots of negative numbers. For example, the square root of 5 would be real but the the square root of -5 would not.

Margarita [4]3 years ago

3 0

Answer:

Yes, it is a real number.

Step-by-step explanation:

All numbers are real numbers.

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Write the equation for the hyperbola with foci (–12, 6), (6, 6) and vertices (–10, 6), (4, 6).

fomenos

Answer:

$\frac{(x--3)^2}{49} -\frac{(y-6)^2}{32}=1$

Step-by-step explanation:

The standard equation of a horizontal hyperbola with center (h,k) is

$\frac{(x-h)^2}{a^2}-\frac{(y-k)^2}{b^2}=1$

The given hyperbola has vertices at (–10, 6) and (4, 6).

The length of its major axis is $2a=|4--10|$ .

$\implies 2a=|14|$

$\implies 2a=14$

$\implies a=7$

The center is the midpoint of the vertices (–10, 6) and (4, 6).

The center is $(\frac{-10+4}{2},\frac{6+6}{2}=(-3,6)$

We need to use the relation $a^2+b^2=c^2$ to find $b^2$ .

The c-value is the distance from the center (-3,6) to one of the foci (6,6)

$c=|6--3|=9$

$\implies 7^2+b^2=9^2$

$\implies b^2=9^2-7^2$

$\implies b^2=81-49$

$\implies b^2=32$

We substitute these values into the standard equation of the hyperbola to obtain:

$\frac{(x--3)^2}{7^2} - \frac{(y-6)^2}{32}=1$

$\frac{(x+3)^2}{49} -\frac{(y-6)^2}{32}=1$

7 0

3 years ago

In basketball, baskets are worth either 2 or 3 points. A missed shot, of course, is worth 0 points. During the 2007-2208 season,

rosijanka [135]

Answer:

1.15

Step-by-step explanation:

Multiply each shot by its point value. Then add. Divide this sum by the total number of shots taken.

288*2 + 79*3 + 340*0 = 813

----------------------------------------

288 + 79 + 340 = 707

813 / 707 = 14.992

The weighted average is approximately 1.15 points per shot.

7 0

2 years ago

ABCD is a quadrilateral.

Natali [406]

Answer:sjebdb

Step-by-step explanation:

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5 0

2 years ago

Is PB>PY? yes or no

Nadusha1986 [10]

Answer:

yes

Step-by-step explanation:

8 0

3 years ago

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I need help with this ok thanks I’m having a real hard time<br> BRANLIEST if you get thanks :)

Brrunno [24]

Answer:

1-11 2-4 3-14 4-9 5-8 6-12 7-15

Step-by-step explanation:plz mark brainliest

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2 years ago

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