You want a new sound system to go with your new television. If you saved $30 for the sound bar that had a 21% discount. What was the original price of the sound bar before the discount?

$142.86

Step-by-step explanation:

In order to know the original price of the sound bar, it is best to write the problem above into a mathematical sentence first.

Given: $30 = the amount you were able to save

          21% = the discount (this means that $30 is the 21% discount)

Let x be the original price of the sound bar.

The mathematical sentence is:

$30 is 21%(0.21) of x

x=

x= $142.857 or $142.86 (once rounded off to the nearest hundredths)

So, the original price of the sound bar before the discount is $142.86

55

step-by-step explanation:

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500