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:
Answer:
y=15.50x
Step-by-step explanation:
The answer is A. all sides are congruent hope this helps! :)
<h2>-CloutAnswers</h2>
A) 0
b)-300
c)-450
(I think)
2x2x7x7
or
2^2x7^2
all factors of 196 is 1,2,4,7,14,28,49,98,196