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Evaluating a Variable Expression To evaluate a variable expression:substitute the given numbers for each variable. use order of operations to solve.
Example # 1 n + (13 - n) 5 for n = 8= 8 + (13 - 8) (Substitute.) = (parentheses) = (Divide l/r.) = (Add l/r.)
Example # 2 8y - 3x2 + 2n for x = 5, y = 2, n =3= 8 (Substitute.) = 8 (exponents) = (Multiply l/r.) = (Multiply l/r.) = (Multiply l/r.) = (Subtract l/r.) = (Add l/r.)
Example # 3: What is the value of -10 – 4x if x = -13?-62 -42 42 52 Answer Now
Example # 4: What is the value of 5k3 if k = -4?-8000 -320 -60 320 Answer Now
Example # 5: What is the value of if n = -8, m = 4, and t = 2 ?10 -10 -6 6 Answer Now
Use the order of operations to evaluate expressions. Objective The student will be able to: Designed by Skip Tyler, Varina High School.
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