Answer:

Step-by-step explanation:
general slope intercept equation of a straight line is given as

where m is slope and b is y-intercept
here
and

So i think here you would FOIL. so -5x^2+10x-5x+10 and then combine like terms :)
Answer:
-4/8
Step-by-step explanation:
that's what my math says
Answer:
The correct option is;
The graph will have a height of 6 feet at 16 seconds
Step-by-step explanation:
The given parameters are;
The start time for throwing the rock = 0 s
The height from which the rock is thrown = 6 ft
The vertex of the parabola = 8 seconds
Given that the vertex is the axis of symmetry, then the time it takes the rock to reach the vertex (8 seconds) from the point (0, 6) will be the same time it takes the rock to reach the point on the other side of the parabola at the same 6 feet which will then have coordinates (8 + 8, 6) or (16, 6) which will be 6 feet in 16 seconds.