Question 642612
t - 7


20 - 7


<font color="red">13</font>


So you are correct.


-------------------------------------------------------


2x^2 


2(3)^2


2(9)


<font color="red">18</font>



So you are correct on both


Note: T - 7 for t = 20 can be reworded to say "find t - 7 when t = 20"