Equation in vertex form, y= (-1/4) x² + 4
<u>Step-by-step explanation:</u>
we have the equation,
y = ax² + 4 ( we need to find "a")
Now we have,
2 = a(4)2 + 4
2 = a (8)+ 4
2-4 = 8a
-2= 8a
a= -1/4
Substituting the value of "a" in the equation, we have
y = (-1/4)(x- 0)² + 4 (or) y= (-1/4) x² + 4
The parabola is opens downward. Therefore the vertex is above the x-axis and then the parabola passes through a point below the x-axis.
Equation in vertex form= y= (-1/4) x² + 4
Answer:
Orginal Speed is 135
Step-by-step explanation:
The ratio of final speed: original speed is
We know that 90 km is it final speed so, we set up a proportion
2/3 x 42/3
hope this helps
2d+3
2(8)+3
Multiply 2 and 8
16+3
19
So the answer is 19
