XEI 401 Packet #1

| |Standard|Description | |Review |XEI 301 |Substitute whole numbers for unknown quantities to | | | |evaluate expressions. | |Focus |XEI 401 |Evaluate algebraic expressions by substituting integers | | | |for unknown quantities. | |Stretch|XEI 402 |Add and subtract simple algebraic expressions. |

|Review | |Evaluate each expression. | |5x + 4 for x = 5 | | | | | | | | | |2(2s – 3t) for s = 5.2 and t = 1.9 | | | | | | | | | |│m│-│3n│ for m = 11 and n = 8 | | | | | | | |Focus | |Evaluate each expression for for m = -2.5. | | | |–m2 + 1.6 | | | | | | | | | |-3.2 + 5m2 | | | | | | | | | |–m – 2.5(m + 19.6) | | | | | | | | | | | |Evaluate each expression for c = -3 and d= -6. | |8[3 + (c – d)2]3 | | | | | | | | | | | |-2(–c – d)3 | | | | | | | | | | | |–c[(-d – c) + (c – d)] | | | | | | | | | | | |-2│c + d│ | | | | | | | | | | | |–c + d2 – 2cd + 8c2 | | | | | | | | | |3c – │2d│ | | | | | | | | | | | |–c2 + 5dc – 12 | | | | | | | |Evaluate for x = -1 and y = 5. | |6x2 + 5xy – 3y2 | | | | | | | | | |Evaluate for x = -5. | | | |x2 | | | | | | | |x3 | | | | | | | |x4 | | | | | | | |Jake solved #17 and said the final answer is -625. What did Jake do | |wrong? Explain in complete sentences. | | | | | | | | | | | | | | | | | |Stretch | |(y3 – 7x4y4) + (-10x4y4 + 6y3 ) – (x4y4 + 5y3) | | | | | | | | | | | | | | | | | | |