Question

Monique had 6 dollars. She found 25 cents and then bought a book. She ended up with 7 quarters. Which expression equals the number of dollars Monique spent on the book?

Answer 1

`6.25-1.75`

Explanation:

Monique had 6 dollars. She found 25 cents and then bought a book

25 cents = 0.25 dollars

Total dollar she had= 6 + 0.25= 6.25 dollars

Let x be the cost of a book

She ended up with 7 quarters. Convert quarter into dollars

1 quarter = 0.25 dollars

7 quarters = 7 times 0.25=1.75 dollars

So she ended up with 1.75 dollars

Amount she had at the beginning - the cost of book = amount ended up

`6.25 -x = 1.75`

Number of dollars spent on the book = Amount she had - amount ended

Number of dollars spent on the book=
`6.25-1.75`