ANSWER
Find out the total discount this customer receives.
To proof
As given in the question
A stuffed heart toy costs $20.00
After Valentines Day
[tex]Discount\ \frac{1}{4}\ is\ given[/tex]
and
[tex]customer\ receive\ an\ additional\ \frac{1}{10}\ at\ the\ register[/tex]
than the expression becomes
[tex]=20 -\frac{1\times20}{4}- \frac{1\times20}{10}[/tex]
= 20 - 5 - 2
= $13
Total discount becomes
[tex]= \frac{1\times20}{4} +\frac{1\times20}{10}[/tex]
= 5 +2
= $7
than the total discount becomes is $7 .
Hence proved
