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4x = 7 + 1 Which equation does this model represent? 4x - 1 = 7 7 = 4 x -1 A. C. Key: Which model represents this equation? = y 5 = 3y + 2 B. D. = 1 Write the expression that is represented by the model. Do not put any spaces in your answer. Use / if you need to show division. Key: = S = 1 Hint: 3 = 15 Key: 2 = 3x - 1 Which equation does this model represent? = x 3x + 1 = 2 = 1 3x - 1 = 2 Which expression shows 9 less than some number? X - 9 9 - X X • 9 X / 9 Which expression shows seven more than 2 times some number? 2n - 7 7 + n 2n ÷ 7 2n + 7 * Use n as a variable. Don't use any spaces or = signs and use a / for division Write an expression that shows 5 less than 3 times some number. In math, what is a variable? Some number that we can't figure out A symbol that stands for an unknown value what makes an expression the answer to an equation What is the variable in this expression? 10y - 3(2 +2) (2 + 2) 10 y 10y 3x - 4 = 8 8 4 3 x What is the coefficient in this equation? |