Answer:
See explanation
Step-by-step explanation:

By the distributive property this is equal to:

Hope this helps!
Answer:
DE=145
Step-by-step explanation:
Both circles are congruent and so are the triangles, because of the radius. So mDE is also 145
80=20x4=10x2x2x2=5x2x2x2x2
5x2x2x2x2
Step-by-step explanation:
Take n common
n(n²+2n-15)=0
now factorise the quadratic one as n when goes to RHS it becomes zero
n²-3n+5n-15=0
n(n-3)+5(n-3)=0
n=3,-5
Step-by-step explanation:
The congruence statement is correct as KL = KR, LM = RQ and MK = QK. Also all the congruent angles correspond to the respective letters.