A student spends $ 48 on school supplies at a store where the sales tax is 7%.what is the total cost of the supplies?
1 answer:
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Make use of prime factorizations:
Both terms have a common factor of :
- - -
The second one is not true! We can write
Both terms have a common factor of :
Since , and
, we'd still have to show that
is a multiple of 6. This is impossible, because
and there is no multiple of 2 that can be factored out.