Answer:
(5,-1)
Step-by-step explanation:
To take the reflection of a point across the y-axis, simply take the negative of the y-value. Therefore, to reflect Point P, (5,1), you just turn the 1 into a -1 so your result is (5,-1).
Number 1 is 4 4/5#2 is-3 #3 is > anf # 4 is 13 units
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: