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3 years ago

14:2= 20: wat is the equivalent ratio

Mathematics

2 answers:

lina2011 [118]3 years ago

6 0

By cross multiplying, the answer should be 2.9

sukhopar [10]3 years ago

6 0

Answer:

$\large\boxed{14:2=20:\dfrac{20}{7}}$

Step-by-step explanation:

$14:2=20:x\\\\\dfrac{14\!\!\!\!\!\diagup^7}{2\!\!\!\!\diagup_1}=\dfrac{20}{x}\\\\\dfrac{7}{1}=\dfrac{20}{x}\qquad\text{cross multiply}\\\\7x=(20)(1)\\\\7x=20\qquad\text{divide both sides by 7}\\\\x=\dfrac{20}{7}$

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3 years ago

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3 years ago

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Parameterize $S$ by

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with $0\le u\le1$ and $0\le v\le1$ . Take the normal vector to $S$ to be

$\vec s_v\times\vec s_u=(20v,8v,4v)$

Then the flux of $\vec F$ across $S$ is

$\displaystyle\iint_S\vec F(x,y,z)\cdot\mathrm d\vec S=\int_0^1\int_0^1\vec F(x(u,v),y(u,v),z(u,v))\cdot(\vec s_v\times\vec s_u)\,\mathrm du\,\mathrm dv$

$=\displaystyle\int_0^1\int_0^1(6-6v,2v-2uv,-8+6v+4uv)\cdot(20v,8v,4v)\,\mathrm du\,\mathrm dv$

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4 years ago

14:2= 20: wat is the equivalent ratio​

14:2= 20: wat is the equivalent ratio