Andre received and spent money in the following ways last month. For each example, write a positive or negative number to represent the change in money from his perspective. His uncle gave him $25 as a present.

Step-by-step explanation:

Let the amount of money Andre has be $A.

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,