3 years ago

Algebra and algerbraaic thinks

Mathematics

1 answer:

Naddik [55]3 years ago

5 0

What is the question

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Which temperature conversion is correct? °c = k - 273 k = 273 x °c k = °c - 273 °c = k + 273?

andrey2020 [161]

K=C-273 is the right answer

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4 years ago

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For a hyperbolic mirror the two foci are 42 cm apart. The distance of the vertex from one focus is 6 cm and from the other focus

navik [9.2K]

Answer:

$\dfrac{y^2}{225} -\dfrac{x^2}{216}=1$

Step-by-step explanation:

For a hyperbolic mirror the two foci are 42 cm apart.

The distance between the foci = 2c.

Therefore:

2c=42
c=21

The distance of the vertex from one focus = 6 cm

The distance of the vertex from the other focus = 36 cm

2a=36-6=30

a=15

Now:

$c^2=a^2+b^2\\21^2=15^2+b^2\\b^2=21^2-15^2\\b^2=216\\b=6\sqrt{6}$

If the transverse axis lies on the y-axis, and the hyperbola is centered at the origin. Then the hyperbola has an equation of the form:

$\dfrac{y^2}{a^2} -\dfrac{x^2}{b^2}=1$

Therefore, the equation of the hyperbola is:

$\dfrac{y^2}{225} -\dfrac{x^2}{216}=1$

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4 years ago

Please answer me .....

andrew11 [14]

Answer:

a. 2x -3

b. 7

Step-by-step explanation:

a. The expression that represents the difference is sales between the two sales will be:

9x - (7x + 3) = 9x - 7x - 3 = 2x - 3

b. What we do here is to simply substitute the value of 5 for x

mathematically, we have to substitute the value of 5 in the expression above

We have this as:

2(5) -3

= 10-3 = 7

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3 years ago

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Simora [160]

The answer would be C

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3 years ago

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hodyreva [135]

Answer:

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Step-by-step explanation:

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3 years ago