On the first down the team returned the ball to the 30 yard line. Then they ran to the 42 yard line for a gain. Which number represents the change? A. -12
B. 0
C. +4
D. +12

(40 points) i need some . an answer definition is appreciated as well.

Consider the functions below. function 1 function 2 function 3 select the statement which is true about the functions over the interval [1, 2] a b function 3 has the highest average rate of change function 2 and function 3 have the same average rate of change. function and function 3 have the same average rate of change function 2 has the lowest average rate of change d.

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).