Next you go to Gamestop down the block from the Marshall’s because you have some old electronics you want to sell since you are feeling like an entrepreneur today. You brought your old Xbox 360 console and two controllers that you don’t use anymore. Gamestop is stingy (mad cheap) though and only gives you $45 total for the console and the two controllers. The person working at Gamestop tells you that the company actually marks up the price of each item by 55.5% before putting them up for sale again. Based on this markup, how much will Gamestop charge in total for the console and the controllers after buying them from you? How much profit will Gamestop earn on this transaction?

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1

b. 2 and 4

step-by-step explanation:

the radius is 2 times the diameter.

step-by-step explanation: