HELP QUICK. By combining three equations, it can be shown that a2+b2=c2. One of the equations is c=e+f. Which of the following could be the other two equations?

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585

What is the length of the midsegment of a trapezoid with bases of length 15 and 25 ?