An experiment was performed by a scientific research team to determine the association between diet and occurrence of heart disease. Which of the following could be a potential confounding variable in the experiment?

What is x and y (use substitution? ) 5x+3y=38 and y=3x+8?

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

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