What are the x-intercepts of this function?

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

Me. i can't figure out this question. give an explanation too. .