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emmasim [6.3K]
3 years ago
5

Solve for n round to the tenths place 14/21.2= n\15

Mathematics
1 answer:
algol133 years ago
5 0
Well.... first lets break this problem up. and work on the left side first 
soo we solve this ↓
14/21.2 = 0.66
now lets plug in our values. The left side will just be replaced by 0.66
Soooo
0.66 = n/15 
so this means we do the opposite on both sides of what n and 15 are doing
In this case they are dividing so yes we are doing the opposite by multiply.
sooooo
0.66 = n/15
 ×15 = x 15 they cancel out on the right hand side and lets solver for the left side.
0.66 x 15 = 9.9 
so that means 
n = 9.9
or we could round it and just say 10
n = 10 
hope this helps:P
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High grade steel consists of 85% iron and 15% magnese. Low grade steel consists of 67% iron and 33% mag ese. NASA orders 500 ton
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Answer:

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Step-by-step explanation:

Let x be the number of tons of high grade steel and y be the number of tons ow low grade steel needed.

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From the first equation,

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Substitute it into the second equation:

0.85(500-y)+0.67y=400\\ \\425-0.85y+0.67y=400\\ \\-0.18y=-25\\ \\y=\dfrac{2,500}{18}=138\dfrac{8}{9}\ tons\\ \\x=361\dfrac{1}{9}\ tons

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