9 + 4 = 13
She is 13 floors away
Answer : what do i answer
Step-by-step explanation:
Answer:I am not very sure but I think ![\frac{1}{51.5}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B51.5%7D)
Step-by-step explanation:
<span>We have to find the product : ( 9 t - 4 ) ( - 9 t - 4 ) = - ( 9 t - 4 ) ( 9 t + 4 ) After that we can use the difference of squares. The formula is: ( a + b ) ( a - b ) = a^2 - b^2. In this case: - ( 9 t - 4 ) ( 9 t + 4 ) = - ( 81 t^2 - 16 ) = - 81 t^2 + 16 . Answer: B ) - 81 t^2 + 16.</span>