David lost 15 dollars from his pocket. Write a signed number to represent this change.

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

If g^-1(x) is the inverse of g (x) which statement must be true

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )