Select the correct answer. Which expression completes the identity cos u sin v=?
OA 2 (sin(u + v) + sin(u – v)]
O B. [cos(u – v) + cos(u + w]
OC. ] (sin(u + v) – sin(u – v)]
[CO3(w – v) – cos(u + v)]
D.
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Nex

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.