WILL GIVE BRAINLIEST AND 50 POINTS PLEASE ITS TIMED!!
1 answer:
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Answer:
Step-by-step explanation:
The vertical displacement function is , where
is measured in meters and
in seconds. Ball hits the ground when
. That is:
Whose roots can be found by using the General Formula for Second-Order Polynomials:
Solutions of this polynomial are:
Only the first root is physically consistent.
9514 1404 393
Answer:
(1) -5 and -3
Step-by-step explanation:
Descarte's rule of signs tells you the lack of sign changes among the coefficients means there are <em>no positive real roots</em>. That eliminates all answer choices except the first one.
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If you want to go to the trouble, you can factor the equation:
y = (x +3)(x +5)
These factors are zero when x = -5 and x = -3.
