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3 years ago

13

Solve (5 x/3) (5 x/5) =54

1 answer:

Phoenix [80]3 years ago

7 0

Answer:

$-\frac{9\sqrt{10} }{5}$ , $\frac{9\sqrt{10} }{5}$

Step-by-step explanation:

$(5*\frac{x}{3}) * (5*\frac{x}{5} ) = 54\\$ calculate the product

$\frac{5x}{3} * x =54$ multiply

$\frac{5x^{2} }{3} = 54$ multiply both sides by $\frac{3}{5}$

$x^{2} =\frac{162}{5}$ separate into two solutions

x = ± $\frac{9\sqrt{10} }{5}$

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Anton [14]

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3 years ago

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icang [17]

Answer:

Step-by-step explanation:

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iVinArrow [24]

He was walking 20 miles per hour

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3 years ago

A student on a piano stool rotates freely with an angular speed of 2.85 rev/s . The student holds a 1.50 kg mass in each outstre

Vlad1618 [11]

Answer:r'=0.327 m

Step-by-step explanation:

Given

$N=2.85 rev/s$

angular velocity $\omega =2\pi N=17.90 rad/s$

mass of objects $m=1.5 kg$

distance of objects from stool $r_1=0.789 m$

Combined moment of inertia of stool and student $=5.53 kg.m^2$

Now student pull off his hands so as to increase its speed to 3.60 rev/s

$\omega _2=2\pi N_2$

$\omega _2=2\pi 3.6=22.62 rad/s$

Initial moment of inertia of two masses $I_0=2mr_^2$

$I_0=2\times 1.5\times (0.789)^2=1.867$

After Pulling off hands so that r' is the distance of masses from stool

$I_0'=2\times 1.5\times (r')^2$

Conserving angular momentum

$I_1\omega =I_2\omega _2$

$(5.53+1.867)\cdot 17.90=(5.53+I_o')\cdot 22.62$

$I_0'=1.397\times 0.791$

$I_0'=5.851$

$5.53+2\times 1.5\times (r')^2=5.851$

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$r'^2=0.107009$

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3 years ago

The Daily News offers a 15% discount on a Saturday ad that also runs on Tuesday. Skyler Sporting Company contracts for half-page

mart [117]

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15% of 330 = 0.15×330 = 49.5
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Cost of the ads for 10 Saturdays and 10 Tuesdays

(10×323)+(10×280.5) = 3230+2805 = 6035

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3 years ago

Read 2 more answers