X² - 16xy + 64y²
= x² - 2*8xy + (8y)²
= (x - 8y)²
Discounts are used to reduce the original price of an item.
David will pay $25 and 92 cents for an item of $32, before tax
The discount (d) is given as:

The price (p) of the item is given as:

So, the amount (A) paid before tax is calculated using:

Substitute known values

Express percentage as decimal

Subtract 0.19 from 1

Multiply 32 and 0.81

Hence, David will pay $25 and 92 cents for an item of $32, before tax
Read more about discounts at:
brainly.com/question/11538623
5x + 3 = 38
5x = 38-3
5x = 35
x= 7
40 divided by 33n. hope it helps!