Select the linking verb and the predicate noun or predicate adjective. (1) The American black duck appears nearly identical to the female mallard, but with one important difference: the absence of white bands on the American black duck' wings. Submit

Solve the system of equations by the substitution method. \( \left\{\begin{array}{l}x+9 y=41 \\ 5 x+6 y=10\end{array}\right. \) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The solution is \( \square \). (Simplify your answer. Type an ordered pair) B. There are infinitely many solutions. C. There is no solution.

5) Determine a lei de formação, \( f(x)=a x^{2}+b x+c \), da função.

Use \( z \)-substitution to evaluate \( I=\int \frac{2 \sin x}{1-\cos 2 x} d x \) A. \( -2 \ln \left|\tan \frac{x}{2}\right|+C \) B. \( \ln \left|\tan ^{-1} \frac{x}{2}\right|+C \) C. \( \ln \left|\cos \frac{x}{2}\right|+C \) D. None of the options E. \( \ln \left|\tan \frac{x}{2}\right|+C \)

1. \( \frac{3}{5} x^{2}-\frac{2}{5}=\frac{2}{3} \)

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