The number of pledges that Melissa collected for this year's charity walk is 8 less than half the number of pledges she collected last year. Which expression represents the number of pledges she collected this year?

1/2x - 8

Step-by-step explanation:

Let

x = number of pledges she collected last year

The number of pledges that Melissa collected for this year's charity walk is 8 less than half the number of pledges she collected last year.

Number of pledges she collected this year = 1/2x - 8

The expression which represents the number of pledges she collected this year = 1/2x - 8

The correct answer is third option