3 years ago

Write the Roman Numeral for XXVII in standard form.

Mathematics

2 answers:

Sergeeva-Olga [200]3 years ago

8 0

Answer:

Step-by-step explanation:

Liula [17]3 years ago

3 0

Answer:

27 my guy

Step-by-step explanation:

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The sum of a number and 3 times its reciprocal is -4.Find the number

Butoxors [25]

Answer:

x = -1 or x = -3

Step-by-step explanation:

x + 3/x = -4

x² + 3 = -4x

x² + 4x + 3 = 0

(x + 1) (x + 3) = 0

x = -1 or x = -3

check: (-1) + (3/-1) = -1 - 3 = -4

(-3) + (3/(-3)) = -3 -1 = 14

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anastassius [24]

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A rectangular box which is 4 in. by 7 in. by 7 in. is covered by foil. How much foil is required

yKpoI14uk [10]

C. 196 sq. In.

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2 years ago

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lidiya [134]

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2 years ago

Find the distance traveled by a particle with position (x, y) as t varies in the given time interval. x = 5 sin2 t, y = 5 cos2 t

rodikova [14]

$\begin{cases}x(t)=5\sin2t\\y(t)=5\cos2t\end{cases}\implies\begin{cases}\frac{\mathrm dx}{\mathrm dt}=10\cos2t\\\frac{\mathrm dy}{\mathrm dt}=-10\sin2t\end{cases}$

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$\displaystyle\int_C\mathrm dS=\int_0^{3\pi}\sqrt{\left(\frac{\mathrm dx}{\mathrm dt}\right)^2+\left(\frac{\mathrm dy}{\mathrm dt}\right)^2}\,\mathrm dt$

where $C$ is the path of the particle. The distance is then

$\displaystyle\int_0^{3\pi}\sqrt{100\cos^22t+100\sin^22t}\,\mathrm dt=10\int_0^{3\pi}\mathrm dt=30\pi$

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3 years ago