Instructions:Select the correct answer from each drop-down menu. A bird catches a fish, flies 100 yards upward in a straight lin
e, and then drops the fish. The fish lands at a spot that is 50 yards horizontally from the point where the bird caught it. The bird flies at an angle of degrees from the ground, and its height from the ground when it drops the fish is yards.
2 answers:
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Answer:
tons of high steel and
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
tons of iron
tons of magnese
In y tons of low grade steel there are
tons of iron
tons of magnese
NASA orders 500 tons of steel, so
and specifies that it must be in the proportion 80% iron and 20% magnese, so
From the first equation,
Substitute it into the second equation: