Perfect-square trinomials are of the form:

and are expressed in squared-binomial form as: 
The only possible choice for squared-binomial form is

Answer: correct choice is A.
From the graph we can conclude:
The cars travels for 2 hours, then stops for 1 hour and finally travels again for 2 hours.
-------------------------------------
Answer: d
Step-by-step explanation:
Final result :
205
——— = 9.76190
21
Step by step solution :
Step 1 :
205
Simplify ———
21
Final result :
205
——— = 9.76190
21
All triangles have a total of 180° in them.
So to find x, simply take 50° and 100° from 180°:
x = 180 - 100 - 50
= 30°
So x = 30°, and thus option D
Answer:
2:25
Step-by-step explanation:
Time=distance/speed
81/36=2.25
2:25 is the time for how long this will take!