Solve when m = 7 and n = 4

A.11
B.3
C.13
D.14

How do you answer this question? (step by step)

Ineed with number 6 , explain how to get 1978

Question 4 of 10 2 points what is the second part of the process of investigating a question using data? a. rephrasing the question o b. describing the data c. collecting the data o d. making an inference submit