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3 years ago

The product of a number and 9, less 20 is 7

Mathematics

1 answer:

anyanavicka [17]3 years ago

6 0

9x-20=7
9x=27
x=3
Hope that helps you :)

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Algebra 1 plz help me

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Step-by-step explanation:

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Step-by-step explanation:

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3 years ago

Water is drained out of tank, shaped as an inverted right circular cone that has a radius of 4cm and a height of 16cm, at the ra

bearhunter [10]

Answer:

$\frac{dh}{dt}=-\frac{1}{2\pi}cm/min$

Step-by-step explanation:

From similar triangles, see diagram in attachment

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$r=\frac{h}{4}$

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$V=\frac{1}{3}\pi r^2h$

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$V=\frac{1}{3}\pi (\frac{h}{4})^2h$

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This implies that $\frac{dV}{dt}=-2cm^3/min$ .

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We substitute this values to obtain,

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3 years ago

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