A) To factor a quadratic equation, standard form is the better form to use because it is easier to pull out a common factor from.
b) To graph a parabola, it is better to use vertex form so that you will know what point to graph as the vertex of the parabola.
c) To identify the vertex, maximum and minimum, it is better to use vertex form because the vertex form will give the values of the coordinates for the vertex. Then, you can use the equation to find the mininmum or maximum. If the graph is negative, it will have a maximum because it points downward infinitely. If the equation is positive, the graph will have a minimum because the graph points upward infinitely.
d) Standard form is easier to use when trying to solve using the quadratic formula because it is easier to see what the coeffiecnts and constants are to plug in for a b and c.
Unit price = $3.15/3lb
Unit price = $1.5/lb
answer
i dont know if this is correct or not tho
Answer:
(-3,3)
Step-by-step explanation:
x² + y² = 18
y = x + 6
(Assuming you mean x and y to the power of 2. Use the ^ symbol to tell that is it an exponent like this: x^2)
First, substitute the y in the first equation
x² + (x + 6)² = 18
FOIL
x² + x² + 12x + 36 = 18
2x² + 12x + 36 = 18
Subtract 18 from both sides
2x² + 12x + 36 = 18
- 18 - 18
2x² + 12x + 18 = 0
Divide both sides by 2
(2x² + 12x + 18)/2 = 0/2
x² + 6x + 9 = 0
Factor
(x + 3)(x + 3) = 0
x has to be -3 for the equation to be 0, so the x = -3
Plug the new x into one of the original equations; we'll use the second one
y = -3 + 6
y = 3