Let me fill in the statement reasoning for you:
Statement | Reasoning
∆ABC ~ ∆RST Given
∆DEF ~ ∆RST
∠A = ∠R, ∠D = ∠R Definition of ~ ∆
∠C = ∠T, ∠F = ∠T
∠A = ∠D,∠C = ∠F Transitivity
∆ABC ~ ∆DEF AA
vertex form is 
comlpete the square

group x terms

factor quadratic coefient

take 1/2 of linear coefient and square it
4/2=2, 2^2=4
add positive and negative of it inside the parentheasees

factor perfect squarer trinomial

expand

is vertex form
Answer: Factor the numerator and denominator and cancel the common factors.
7x/6+5/6
Step-by-step explanation:
Answer:
x=25 y=5
Step-by-step explanation:
x=25
y=5
x*2=50
8*5=40
50-40=10