The vertex of the parabola is given by :

.
So,

is the first coordinate of the vertex, which means it is also the point where the line of symmetry passes.
The line of symmetry divides the parabola into 2 symmetrical parts: the x-intercepts are also symmetrical to each other with respect to this line.
So, if one of the x-intercepts is

, that is 3 units to the right of the x-intercept, the other must be 3 units to the left. Thus, the second x-intercept is :
Answer:

,
Answer:

Step-by-step explanation:
Using the division rule when dealing with exponents

meaning that when we divide exponents that have the same base but different powers we can subtract the power of the bottom exponent from the top exponet.
so using that we are going to do 2, 4 and 9



Combine all the terms and we get

One snack packet will cost 80 cents
(3<span> x $9) + (</span>3<span> x </span>$1<span>) = $27 + $3 = </span>$30<span>.</span>