When a polygon reflects across the y-axis, how do the coordinates of the points change?
The sign of the x-coordinate changes.
The sign of the y-coordinate changes.
The sign of both the x and y coordinates change.
The x and y coordinates are switched and the signs of both change.

Raj encoded a secret phrase using matrix multiplication. using a = 1, b = 2, c = 3, and so on, he multiplied the clear text code for each letter by the matrix to get a matrix that represents the encoded text. the matrix representing the encoded text is . what is the secret phrase? determine the location of spaces after you decode the text. yummy is the corn the tomato is red the corn is yummy red is the tomato

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9