Please help :) Given AB intersects DE at point C.

Prove:
What is the missing reason in step 5?

•linear pair postulate
•given
•definition of complementary angles
•congruent complements theorem

An equation where variables are used to represent known values—function notation true or false

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each,and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent.how much did jame pay at the end?