3. suppose you are buying a $30 pair of shoes that are discounted 20%. how much will you pay for the shoes?

$24

Step-by-step explanation:

calculate 20% of $30 and subtract the discount from the cost price

20% = = 0.2, hence

discount = 0.2 × $30 = $6

buying price = $30 - $6 = $24

$24

Step-by-step explanation:

To determine the discount, we take the price of the shoes and multiply by the discount rate

Discount = 30 * .2

Discount = 6

The new price is the original price  minus the discount

new price = 30-6

New price = 24

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

if you need just tell me and i will come to the rescue.

step-by-step explanation: