Solve the system of equations. 8.2 + 5y = 24 y = - 4.
1 answer:
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Answer:
The pebble will hit the ground 8.29 second after it is thrown.
Step-by-step explanation:
Given that,
The height of the pebble after t seconds is given by the equation
h= -16t²+24 t+900.
When the pebble hit the ground, the height of the pebble will be zero.
So putting h=0 in the given equation.
0 = -16t²+24 t+900
⇒-4(4t²-6t-225)=0
⇒4t²-6t-225=0
Applying quadratic formula , here a=4, b= -6 and c= -225.
⇒ t = 8.29, -6.79
Since time can not negative.
∴t=8.29 seconds.
The pebble will hit the ground 8.29 second after it is thrown.
Answer:
1.
3. (undefined slope)
5.
7.
Step-by-step explanation:
slope (m)
rate of change (r)
1. m =
3. m = (undefined slope)
5. m =
7. r =
Hope this helps!