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svet-max [94.6K]
3 years ago
15

Please show work need help

Mathematics
1 answer:
Lorico [155]3 years ago
6 0

Step-by-step explanation:

volume of cube=l³

=(11)³

=1331m³

volume of cuboid=l*b*h

=11*8*4

=352m³

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Solve for x 3x - 2 = 4x + 1
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Answer:

x = -3

Step-by-step explanation:

3x - 2 = 4x + 1

Now taking 3x to right hand side of the eqn . & +1 to the left side eqn. , sign of 3x changes to -3x & +1 changes to -1 .

-2-1 = 4x - 3x

Now solving this , we get the value of x.

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An alloy is composed of nickel, zinc, and copper in a ration of 7:2:9. How many kilograms of each metal are needed to make 3.6kg
motikmotik
Well, the short answer is, we divide that 3.6 by (7+2+9) and then we give as many pieces at the ratio to each, so let's do so,

\bf \stackrel{nickel}{7}~~:~~\stackrel{zinc}{2}~~:~~\stackrel{copper}{9}
\\\\\\
\stackrel{nickel}{7\cdot \frac{3.6}{7+2+9}}~~:~~\stackrel{zinc}{2\cdot \frac{3.6}{7+2+9}}~~:~~\stackrel{copper}{9\cdot \frac{3.6}{7+2+9}}
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\stackrel{nickel}{7\cdot 0.2}~~:~~\stackrel{zinc}{2\cdot 0.2}~~:~~\stackrel{copper}{9\cdot 0.2}
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\stackrel{nickel}{1.4}~~:~~\stackrel{zinc}{0.4}~~:~~\stackrel{copper}{1.8}
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