Question

3. Juan goes to the book fair where paperback books are $6 and hardbackbooks are $8.50. Juan buys four paperback and 3 hardback books. He payswith a $50 bill.3a. Edward wrote the expression below to represent how much changeJuan should get back. However, there is something wrong with his work.Explain the mistake and help Edward fix the expression. *50 - 6 x 4 + 8.5 x 33b. How much change does Juan get back?

Answer 1

The mistake with the expression is that instead of writting

$-8.5\times3\text{ }$

he wrote

$8.5\times3$

So the correct expression would be

$50-6\times4-8.5\times3$

b. Juan should get $0.5 as change