HELP PLEASE

this is really hard help me

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

Three times the sum of a number and seven is negative thirty-six. what is the number?

In stepmber, daniel and justin opened a business. during their first three months of business, their average monthly profit was $51. if during their first month, they lost $29, and during their second month, they gained $115, what was their profit or loss for their third plzzz i will give you 299 points