Answer:
2.5 pounds per book
Step-by-step explanation:
Set up a proportion
20 copies / 50 pounds = 1 copy / x pounds
Cross multiply
20x = 50
Divide both sides by 20
x = 2.5 pounds
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Answer:
you use your biggest brain cell
Step-by-step explanation:
The conjugate of any pair is just the same pair with a different sign in the middle.
a + b conjugate a - b
a - b conjugate a + b
-z - w conjugate -z + w
and so on.
Answer:
3400 ft
Step-by-step explanation: