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Neko [114]
3 years ago
8

How can i find this answer ?

Mathematics
2 answers:
Furkat [3]3 years ago
8 0
19-2x=3x-16

19+16=3x+2x

5x=35

Therefore, x=7.

19-2x=3x-16

19+16=3x+2x

5x=35

Therefore, x=7.

As angle /_ABC is 19-2x,

angle /_ABC is 19-2(7)=5.
Tanzania [10]3 years ago
4 0
19-2x=3x-16\\
5x=35\\
x=7

\angle ABC=19-2\cdot7=19-14=5^{\circ}
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Step-by-step explanation:

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Solve the rational equation (3x^2+1)/(x-1) + x =4 + 4/(x-1)
natita [175]

Answer:

The answer to your question is letter D

Step-by-step explanation:

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                               \frac{3x^{2} + 1}{x - 1} + x = 4 + \frac{4}{x - 1}

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Cancel the denominators and expand

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Factor

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Help me, Don't spam
Anuta_ua [19.1K]

QuestioN:

  • A container in the shape of of a frustum of a cone having diameters of its two circular faces as 35 cm and 30 cm and vertical height 14 cm, is completely filled with oil. if each of oil has mass 1.2 g, then find the cost of oil in the container if it costs $ 40 per kg.

{\large{\frak{\pmb{\underline{ Clearly,\:we\: have}}}}}

\sf \:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\bullet\:r = \bf\dfrac{30}{2}\:cm=15\:cm

\sf \:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\bullet\:R = \bf\dfrac{35}{2}\:cm=17.5\:cm

\sf \:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\bullet\:h = 14\:cm

\:\:\:\:\:\:\:\:\:\:━━━━━━━━━━━━━━━━━━━━

\:

{\bold { \underline{\small{Now,}}}}

\:\:\large{\ddagger}\underline {\footnotesize{\boxed{\frak{Volume_{(container)}={\frak{\orange{\bigg\{\bf\dfrac{1}{3}\pi (R^2+r^2+Rr)h\bigg\}cu}}}}}}}

\:\:

\:

\sf {\scriptsize\Bigg[\bf\dfrac{1}{3}\times \bf\dfrac{22}{7}\times\Bigg\{\bigg(\dfrac{35}{2}\bigg)^2+(15)^2+\dfrac{35}{2}\times 15\Bigg\}\times 14 \Bigg]cm^3}

\:\:

\:

\sf \:\:\:\:\:\rightarrowtail\: \dfrac{44}{3}\times\bigg(\dfrac{1225}{4}+225+\dfrac{525}{2}\bigg)cm^3

\:\:

\:

\sf \:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\rightarrowtail\: \bigg( \dfrac{44}{3}\times \dfrac{3175}{4}\bigg)cm^3

\:\:

\:

\sf \:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\rightarrowtail\: \bigg( \dfrac{3175 \times 11}{3}\bigg)cm^3

\:\:

\:

\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\small{\underline{\mathcal{\red{Mass\:of\:1\:cm^3\:of\:oil\:=\:1.2\:g }}}}

\:\:

\:

\:\:\:\:\:\:\:\sf \footnotesize{Mass_{(oil\:in\:the\: container)}=\bigg( \dfrac{3175 \times 11}{3}\times1.2 \bigg)\:g}

\:\:

\:

\sf\:\:\:\:\:\:\:\:\rightarrowtail\:\bigg( \dfrac{3175 \times 11}{3}\times\dfrac{12}{10}\times\dfrac{1}{1000}\bigg)\:kg

\:\:

\:

\sf \:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\rightarrowtail\:\dfrac{1397}{100}\:kg\:=13.97\:kg

\:\:

\:

  • \bf\twoheadrightarrowCost of oil at $40 per kg = $(13.97×40)\:\:=\:\large{\underline{\mathcal{\purple{\$\:558.80.}}}}
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