3 years ago

How do I do these problems?? (24 points)

Mathematics

1 answer:

trasher [3.6K]3 years ago

8 0

91

^^^^^^^^^^^!!!!!!!

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$361\dfrac{1}{9}$ tons of high steel and $138\dfrac{8}{9}$ tons of low steel

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.

In x tons of high grade steel there are

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$0.15x$ tons of magnese

In y tons of low grade steel there are

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$0.33y$ tons of magnese

NASA orders 500 tons of steel, so

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$0.85x+0.67y=500\cdot 0.8\\ \\0.85x+0.67y=400$

From the first equation,

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Substitute it into the second equation:

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