If the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.
Then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.
One way in which you can find the vertex is to calculate x = -b / (2a). Here, that comes to
-(-2)
x = ---------- = 1. f(1) = 1^2 - 2(1) - 8 = - 9. Vertex is at (1, -9).
2(1)
Find another point on the curve: Let x=0, for which y=-8. Then (0, -8) is on the curve. Plot the vertex and this point and draw a smooth parabola thru both.
Answer:
15+7=22
Step-by-step explanation:
Set up the equations.
Answer: $48
Step-by-step explanation: The amount of money Joe made can be divided by 9. 54/9 = 6. Joe made 9 dollars six times so Leila made 8 dollars 6 times. 6 x 8 = 48.
Answer:
The rate of change is $1.50
Step-by-step explanation:
To find this answer i divided $150 by 100 and got 1.5 which is $1.50