The vertex is
The elimination method is useful when you can eliminate one of the variable terms from an equation by adding or subtracting anot
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The vertex is
Answer: if S is the distance, the fact that the distance is proportional to the square of the time means that S(t) = a* where a is a constant of proportionality, with units of
.
We know that S(1) = 16 feet = a*1, then a = 16
then S(2) = 16*4 feet = 64.
and if we want to know in how much time te objet will fall 400feet, then S(t₀) = 400 feet = 16*
so t₀ = = 5s.