Can someone me find the arc length ?

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Which point is a solution to y s 4x + 5?

The table below shows the approximate height of an object x seconds after the object was dropped. the function h(x)= -16x^2 +100 models the data in the table. for which value of x would this model make it the least sense to use? a. -2.75 b. 0.25 c. 1.75 d. 2.25