homework mix test # 15

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56 part 2c advanced math try on your own directions take a s much time as you need on these questions. work carefully and methodically. there will be an opportunity for timed practice later in the book. ■ hint: for q i , think about the exponent rules that you will need to apply. if x an j x q, w h a t i s the value of c? 9x 3 if a and b are positive integer constants and x a yb = -128 , where x 1hint: for q6, what do you need to do before squaring both sides? 8 + 2x -+ 2— = 9 for what value of x is this equation true? -10 -2 © 19 no solution . hint: for q9, remember that the denominator of the exponent becomes the root, and the numerator remains the exponent. 4 when simplified, 8 3 is …

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© 3x 3 — 8x 2 4- 3x — 15 © — 3x 3 4- 8x 2 — 3x 4- 15 13 16 13 hint: for q13, as you calculate each term, eliminate choices. stop when there’s only one choice left. if a = 4x 2 4- 7x - 1 and b — -x 2 - 5x 4- 3, then what is — 2b? ® 4x 2 4- -yx © 4x 2 4- -x - © 8x 2 4- - x - | © 8x 2 4- -j-x - y-z k 215 66 part 2c advanced math try on your own directions take as much time as you need on these questions. work carefully and methodically. there wil l be an oppor- tunity for timed practice later in the book. 18 which of the following is equivalent to 2b ma th 10 2x + 2 16 10 2x 4- 2 …

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$49x2 + 4 32 hint: for q32, how do you add fractions with different denominators? 3a + 9 -9 ( a -3 ) 2 3a -9 in the given expression, (a — 3) 2 = 6. what is the value of the expression? 36 hint: for q36, make sure you pay attention to al l of the information given to you. if 1 ~ " j 2 8 — 0 and c 6, which of the following is equivalent to 2 _____£ _____ ? a -2 a -6 ® 2a 2 —16a 4- 24 a 2 - 8a + 12 2 atr — 4a © - 2 ~ 8 --- a 2 -8a +12 228 l < qo`shimcha test kaliti a) b) c) d) 3 17 74 -20 16 7 160 200 350 128 256 760$

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56 part 2c advanced math try on your own directions take a s much time as you need on these questions. work carefully and methodically. there will be an opportunity for timed practice later in the book. ■ hint: for q i , think about the exponent rules that you will need to apply. if x an j x q, w h a t i s the value of c? 9x 3 if a and b are positive integer constants and x a yb = -128 , where x 1hint: for q6, what do you need to do before squaring both sides? 8 + 2x -+ 2— = 9 for what value of x is this equation true? -10 -2 …

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