156 There are 9 books stacked on a shelf. The thickness of each book is either 1 inch or 2
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2 156 Thee ae 9 books sacked on a shelf. The hickness of each book is eihe 1 inch o 2 F inches. The heigh of he sack of 9 books is 14 inches. Which sysem of equaions can be used o deemine x, he numbe of 1-inch hick book in he sack, andy, he numbe of 2-inch hick books? x +y = 14 2x +y = 9 G x +y = 14 x+2y=9 i ÿ'ÿcÿÿ + 2y = 14 x+y:9 (ÿ oÿ ÿzooÿ-%') J x+y=9 (" ÿ- O" "ÿ 2x +y = J 157 A The populaion of a own is cuenly 9,000. The funcionp = 9, can be used o esimaep, he populaion of he own yeas fom now. Based on his funcion, which.iÿ ÿjÿ saemen is ue9,^,',, -ÿ /i".ÿ2- ÿ** The populaion of he own is inceasing a a consan ae. q q ÿ ÿ,, 4 C D The populaion of he own will each 10,000 beween 11 and 12 yeas fom now. * The populaion of he own will incease by 256 people wo yeas fom now.ÿ 000 "1 ÿ 6ÿZÿ The populaion of he own will incease and hen decease Wha is he equaion in sandad fom of he line ha passes hough he poin (1, 24) and has a slope of-0.6? \] / 3x + \/ G 3x + 5y = 77.- k'l\) 3x+5y=123 \ - \, 2-' \ ) J 3x+5y= / ( ÿ,) "
3 159 The lae fee fo ovedue books a a libay is $0.25 pe day pe book, wih a maximum lae fee of $5.00 pe book. Which gaph models he oal lae fee fo 3 books ha wee checked ou on he same day and ae ovedue? ]!i ÿ A Fees fo Ovedue Books y 4 I " ÿ ÿ,, I I II 3 7Cÿ i* [ i-'t _i I oÿ '-2!0.1 c J Fees fo Ovedue Books -=,-Iÿ]-ÿI T-T ÿ i. X l[ O" Days Ovedue Days Ovedue v Fees fo Ovedue Books Y Fees fo Ovedue Books I Iÿi I B O: S " Days Ovedue 2 "'l't"l T-C? q--7-[ l l0= Days Ovedue x :k 160 Fo he funcion w,ÿ(9):-7, ands(-7): 9.1 Ify:w(x), wha is he value ofy when x = -7? Recod you answe and fill in he bubbles on you
4 ********************************************************************* * 161 The gaph of he quadaic funcion h passes hough he poins (-4, 32), (3, 4), (5, 14), * * and (7, 32). Which of he following shows he same elaionship as h? *. y. "i! i i i : i..l ).!i ÿ, ÿ,ÿtÿtiihÿ... Iÿ.,, * ili" ÿ ÿt ii.lÿ7i[.i.7 ÿ 'vi ' *...L..,,.L..L.+..L...L...L.ÿ X *... ÿ...ÿ,,- ÿi: ÿiiiiiiii::ÿ:i 32-4, h(x). o _.ÿiÿii1..+. iiii.i il.i: * -.. z... i * i ; i! ' I ÿ ] -. * x h(x) *, B h(x)= x2+3x+4.. \. * 162 An aiplane's aliude in fee duing is descen fo landing can be found using he * * funcionf(x) = -300x + 30,000, whee x epesens he hoizonal disance in miles fom * * whee he plane begins is descen. Afe new govenmen egulaions become law, he * * aiplane's descen will be modeled by he funcion g(x) = -300x + 30,500. Which * * saemen descibes his change? * * * The aiplane sas is descen fom an aliude 500 fee highe. *. G The aiplane sas is descen fom an aliude 500 fee lowe.. * H The aiplane descends 500 fee pe hoizonal mile fase. * *,I The aiplane descends 500 fee pe hoizonal mile slowe. *
5 163 The gaph ofy = 3x2-2 is shown below. If he coefficien OfX2 is changed fom 3 o anohe posiive numbe o ceae a new funcion, how will he gaph of he new funcion compae wih he gaph of he oiginal funcion? A B D The x-ineceps of he new gaph will be he same as he x-ineceps of he oiginal gaph. The veex of he new gaph will be diffeen fom he veex of he oiginal gaph. The new gaph will be wide o naowe han he oiginal gaph. The new gaph will open in he opposie diecion as he oiginal gaph.
6 164 G H J The sophomoe class needs a combined oal of 216 medium and lage T-shis fo field day. The numbe of medium T-shis needed is hee imes he numbe of lage T-shis needed. Based on his infomaion, would i be easonable fo he sophomoe class o ode 72 lage T-shis and 144 medium T-shis? No, because he numbe of medium T-shis is no 3 imes he numbe of lage T-shis. No, because he numbe of lage T-shis is no 3 imes he numbe of medium T-shis. Yes, because he oal numbe of T-shis is Yes, because he numbe of lage T-shis is - of he oal numbe of T-shis.! I ; i 3 j i / LO / / [D d < k..,.' /! i 165 Which inequaliy is equivalen o 7x - 2y > 8? 'i- I_o2. j A B D j j j j j j j j j j j j J j j j j j j j j j j j j (F 166 G H J If he gaph ofy = 9x + 4 is anslaed 4 unis up, which equaion descibes he new gaph? y=9x+8 y= 13x+4 y= 13x+8 y=4x+4
7 4 * 167 The funciony = xÿ + x - 6 is gaphed below. x + +. A 4 4, D , 168 Wha ae he values ofx when X2 + X -- 6 = -4? x = -4 and x = 6 x = -2 and x = 1 x = -3 and x = 2 x=-5andx=-6 2 ( I x v::: I Which expession is equivalen o -6xÿ - 1 lx - 4?./ : (3x + 7)(3x- 3) ÿ,z ÿ, * G (-3x + 4)(2x - 1) ÿ (ÿ-/. (+ÿ ÿ 4-ÿ" i;ÿ', ÿ- 1_i (3x- 7)(3x + 3), J (-3x - 4)(2x + 1) - 'f, - ÿ>x ÿ-?ÿ?.,- (ÿ./.ÿ-llx -ÿ4 -l-
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