Erik pays 225 in advance on his account at the athletic club. Each time he uses the club , $9 is deducted from the account , write an equation that represents the value remaining in his account after x visits to the club . Find the value remaining after 7 visits

What properties allow transformation to be used as a problem solving tool

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

God's gym charges a sign-up fee of $100 plus $30 per month. write an expression to represent how much someone would pay for a membership.