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4 years ago

Please help, tysm if you do :)

Mathematics

1 answer:

romanna [79]4 years ago

5 0

Answer:

The answer is B. 12,34 cm .....:)

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Write in expression form. 8 times the quantity of a number and 6

Vilka [71]

Answer:

8(x+6)

Step-by-step explanation:

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3 years ago

What is the circumference of a drumhead with a diameter of 14 in? Round to the nearest tenth

myrzilka [38]

By the rule of
$2\pi \: r$
and r being 7 as it is half the diameter the answer is
$14\pi$

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3 years ago

What is the equation of the ellipse with foci at (5, 0), (-5, 0) and vertices (9, 0), (-9, 0)?

forsale [732]

Answer: $\dfrac{x^2}{81}+\dfrac{y^2}{56}=1$

Step-by-step explanation:

General equation of ellipse : $\dfrac{x^2}{a^2}+\dfrac{y^2}{b^2}$

Given: Vertices of ellipse : (± 9,0)

Since the vertices are of the form (± a, 0).

i.e. a=9

Thus, the major axis is along x-axis.

Also, foci of the ellipse = (±5,0)

Since, foci is of the form (± c,0), i.e. c=5

Since

$c^2=a^2-b^2\\\\\Rightarrow\ 5^2= 9^2-b^2\\\\\Rightarrow\ b^2=81-25\\\\\Rightarrow\ b^2=56$

Equation of ellipse :

$\dfrac{x^2}{9^2}+\dfrac{y^2}{56}=1\\\\\Rightarrow\ \dfrac{x^2}{81}+\dfrac{y^2}{56}=1$

Hence, the required equation : $\dfrac{x^2}{81}+\dfrac{y^2}{56}=1$

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4 years ago

Which situation results in a final value of zero ? (A) the overall change in temperature when the temperature goes from -10 F to

oksano4ka [1.4K]

Answer:

The answer is B

Step-by-step explanation:

When he bought the item he lost 2.25 dollars giving him a net profit of -2.25

When he sold it for 2.25 he gained a net profit of 2.25 which cancels out his negative net profit giving a final product of 0.

8 0

3 years ago

Read 2 more answers

Help me with that please, please I really need help

d1i1m1o1n [39]

Not sure.................

4 0

3 years ago