Which of the following steps would you use to
evaluate (a + b)??

What is the value of x when x + 7 = 21?

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? )

The sum of five and a number n is at least 12