Answer:
Step-by-step explanation:
Let the equation be : 
The point (1,1) must satisfy this equation.
Similarly, the point (1,3) must satisfy:
Also for the point (9,2), we have:
Solving the equations (1), (2) and (3) simultaneously, we get:
We Substitute this values to get:
Multiply through by 8 to get:
Answer:
2(y+5)
Step-by-step explanation:
= 2y+10 simple multiplication method
Answer:
At the time of launch height of the object was 60 meters.
Step-by-step explanation:
An object was launched from a platform and its height was modeled by the function,
h(x) = -5x² + 20x + 60
Where x = time or duration after the launch
At the time of launch, x = 0
So, by putting x = 0 in this equation,
h(0) = -5×(0) + 20×(0) + 60
h(0) = 60
Therefore, at the time of launch height of the object was 60 meters.
