X=-6
You get all the X to one side, and all the numbers to the other. Then divide. Work is shown in image below.
You get all the X to one side, and all the numbers to the other. Then divide. Work is shown in image below.
Jen and Sarah go to lunch at the green grill. Their meals total $28.00. The tax is 6%. What is the total cost including tax?
1 answer:
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So the easiest method to find the vertex (the minimum in this case) to do this is to find the axis of symmetry, then plug it into the function.
Firstly, the equation to find the axis of symmetry is , with b = x coefficient and a = x^2 coefficient. The equation equation can be solved as such:
Since the vertex falls on the axis of symmetry, we know that the x-coordinate of the vertex is -2.5. Now to solve for the y-coordinate, plug in x with -2.5 and solve as such:
Now putting it all together, our minimum value (vertex) is (-2.5,-12.25).