How many solutions does this system have? y=-3x -9x+4y= 21
A. one
B. two
C. an infinite number
D. no solution​

Ahigh school has 3636 players on the football team. the summary of the players' weights is given in the box plot. approximately, what is the percentage of players weighing less than or equal to 225225 pounds?

Which of the following is the result of expanding the series

Acomposition of transformations maps δxyz to δx"y"z". the first transformation for this composition is , and the second transformation is a 90° rotation about point x'.