Answer:
<em>3 seconds</em>
Step-by-step explanation:
Complete question:
<em>An object is dropped from a bridge and allowed to freefall to the ground. The height of the object over time can be modeled using h(t)=144-16t2. How many seconds will it take the object to reach the ground? 2 seconds 3 seconds 9 seconds 16 seconds</em>
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Given the height of an object modelled by the expression;
<em>h(t)=144-16t²</em>
The object will reach the ground when h(t) = 0
Substitute into the formula
0 = 144 - 16t²
-144 = -16t²
144 = 16t²
Swap
16t² = 144
t² = 144/16
t² = 9
Square root both sides
√t² = ±√9
t = ±3secs
<em>Since the time cannot be negative, hence the object will reach the ground 3 seconds after</em>
Ur answer is B 2x 4y hope its right
Answer:
Add 4 to each side.
Step-by-step explanation:
y−4=3
(y-4)+4=3+4
y=7
The answer is: [C]:
<span>___________________________________________________________
"{(1, –1), (2, –2), (0, 0), (1, 1), (2, 2)}</span> " <span>{(1, –1), (2, –2), (0, 0), (1, 1), (2, 2)}" .
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This set of ordered pairs is NOT a function because their is one x-coordinate in this set that has multiple y-coordinates;
specifically: "(1, -1)" ; and "(1, 1)".
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All of the other answer choices given are functions.
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Is there a picture to go with it?
