A cell phone company is giving a 20% discount on all accessories. Which expressions can be used to find the sale price of an item with an original price of x dollars?

One possible answer could be 0.8x.

Step-by-step explanation:

Think of it this way, if a store took 20% off a price, how much would be left?

Well, that's fairly easy to solve.

100% - 20% = 80%

(100%) - (discount %) = amount you need in a equation.

Now that you have 80%, convert it to a decimal.

80% ---> 0.8

Considering that x, would be the normal store price, how can you use 0.8 in the equation?

Well, simple, just multiply x by 0.8.

x * 0.8 = the discount

All there's left to do is to simplify it some more.

x * 0.8 ---> 0.8x

That's All!

***Please note:

Because you listed it as which expressions could be the answer and did not list the choices, I only provided a sample answer. If you can provide more details, I'll be glad to help.

y=3n + 1

step-by-step explanation:

this is wrong because it says the second number is one less and i added one instead

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of