Is the answer suppose to be in a percentage?
Answer:
The equivalent expression can be given as:
⇒ 
Step-by-step explanation:
Given expression:

To write an equivalent expression:
Solution:
In order to write an equivalent expression, we will combine the like terms. By like terms, we mean the terms with the same variable constant.
For example :
and
are like terms.
We have:

Combining like terms :
⇒ 
⇒ 
Thus, the equivalent expression can be given as:
⇒ 
The question is equal to: 135 / 45
Divide:
135 / 45 = 3
3 = 300%
Answer = 300% (I think)
~Hope this helped~
from question d = 16t^2 = 56-4t
=》 16t^2 -56 + 4t =0
=》 4t^2 - 14 + t = 0
=》 (4t-7)(t+2) =0
=》 t = 1.75 seconds