The answer is C
By the way, that expression means "n choose k". Hope I helped!
B, because the mid segment is half the length of the third side
Answer:
question is not clear pls resend
They are terms<span> that contain the same variables raised to the same power. Only the numerical coefficients are different. In an expression, only </span>like terms<span> can be combined. We combine </span>like terms<span> to shorten and simplify algebraic expressions, so we can work with them more easily.</span>
