What is 3x-4y=4 using substitution method

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

Which of the following can be used to explain a statement in a geometric proof?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)