Geometry help don’t take points if I get 70%+ I’ll give some away!!

Ill mark the brainliest if you me with the these three questions 7,8,9

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove

Calculate the average rate of change over the interval [1, 3] for the following function. f(x)=4(5)^x a. -260 b. 260 c. 240 d. -240