The answer is b 5x-y=7 2x+y=0
Answer: n = 17
Step-by-step explanation: n= -68/-4= 17
The building blocks of geometry would be point line and plane.
orlando 是不对的。ABBY 是对的应为2是power
Answer:
(5x +4y)^2
Step-by-step explanation:
The first and last terms are both perfect squares, and the middle term is twice the product of their roots. That means the trinomial is the perfect square trinomial ...
25x^2 +40xy +16y^2 = (5x +4y)^2
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It matches the pattern ...
a^2 +2ab +b^2 = (a +b)^2
