At the start of the month, the value of an investment was $48.45. By the end of the month, the value of the investment changed by a loss of $13.80. what was the value, in dollars, of the investment at the end of the month? bc

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