Gountdown: 8 Weeks ED CD -=- CB AB ED CB CD AB ED.AB=CB,CD

Transcription

1 NAM Guntwn: 8 Weeks AT PRO 1. Tringles ABC n C re slpe tringles Prt A: Shw tht the slpe tringles re similr. Prt B: Cmpre the rise t the run fr ech f the tringles. Write the resn next t ech step in the slutin C -=- CB AB.AB=CB,C. AB CB. C C. AB =-C. AB CB C AB Prtt C: Wht cnclusin cn yu rw frm the wrk in Prt B?. -g Yq 9,.. g A tennis curt is rectngulr with length f 12O feet n with f 6O feet. Fr wrm-up, plyer runs lng the ignl f the cuft frm ne crnert the ther. His prtner runs the length n with f the curt t the ppsite crner. Hw much frther i the prtner run? xplin yur nswer. Run t the nerest tenth. 8.G.7 i u U Curse. Cuntwn. 8 Weeks 7

2 A stuent climbs up the ler f slie n slies wn. Select ll f the sttements tht re represente by the grph. 8.F.5 The stuent reches the bttm f the slie t. The stuent slies fster t the tp f the slie thn t the bttm. 9 6 G.g cl C The stuent puses t the tp f the slie befre sliinq wn. t] The stuclent slws s he reches the tp f the ler. t] The stuent is never mre thn 6 feet ff the grun. very 15 minutes, the height f the rruter in the pl is mesure n pltte. The t re shwn in the tble. 8.SP.2 Time (min) Wter Height (cm) Prt A: Cnstruct sctter plt f the t. 1 ; -9 6 (t, L b4. vz Prt B: Wul the equtin y = x + 4 r the equtin y = O.5x + O better mel the t? xplin" ime (min) Rbert plts crintes t represent the crners f her gren: 412.5,1.5), B(-4,), n C(-2, -5). She ecies t quruple the length f ech sie ursing the rigin s the center fr the enlrgement f her gren" Select ll f the sttements tht re true but the new crintes. 8.G. n The perimeter f the gren is 4 times the riginl perimeter. A'is lcte t (1, 6)" B'is lcte t (-1,.75). n C'is lcte t (-8, -2). The re f the gren is 8 times greter thn the riginl. Think Smrt fr SBAC n the ctul test, yu might be ske t click ll f the crrect nswer chices. ln this bk, yu will be ske t she bx next t ech crrect nswer chice, + =? q- t 5', g 8 Curse. Cuntwn. 8 Weeks

3 Cuntwn: 7 Weeks AT PRO SCOR {. Jeremy tkes his hert rte (in bets per minute) fter running n the tremill fr ifferent peris f time. Fin n escribe the cnstnt rte f chnge fr this functin. Fin n escribe the initil vlue. 8.F.4 rte f chnge: Time (min) Hert Rte (bpm) initil vlue: -q 2. 17: = /,,F by the SAS Similrity Therem. ^,ABC Since there re tw crrespning cngruent ngles, the thir ngles in the tringles must ls be cngruent. ml = mlb n mlc = mlf By the Angle-Angle Similrity, AABC * AF. ^ Crrie cretes tringulr pennts t be wrn s necklces. Tw pennts re shwn. Select ll f the sttements tht re true but the pennts. 8.G.4 The mesure f the thir ngle in ech tringle cn be fun subtrcting the sum f the given ngles frm 6. by 9? Z u =* 6-9 Members f bk club py lwer prices fr iniviul bks n flt shipping rte. One member grphs hw much she spens n rws line f best fit. Write n equtin fr the line f best fit. Wht es the slpe represent? Wht es the y-intercept represent? 8.SP ^ tt 9r f^ 66 F Number f Bks Purchse Curse. Cuntwn. TWeeks 9

4 4. A r ivies the neighbrh prk int tw prts. Clvin plts ne prt in crinte plne. The prt f the prk shwn is reflectin ver the x-xis f the ther prt. 8.G. ffi Prt A: rw the ther prt f the prk. Prt B: Write the crintes f the vertices f the prt tht yu rew. Then escribe the effects f reflectin crss the x-xis n the crintes. 5. The chir strte selling Cs f their cncerts s funriser in 28. The tble shws the number f Cs sl ech yer. 8.SP.2 Psrt A: rw line f best fit. Prt B: Write the equtin f the line f best fit. Accring t the mel, hw mny Cs were sl in 28? Preict hw mny Cs will be sl in 2O16. Justify yur nswer. 5 g 45 + fi rs u 25 s 2 15 t Yers Sinee 2(X)8 Think Smrt fr SBAC n the ctul test, yu might be ske t click buttn t grph line. n this bk, yu will be ske t rw the line in the crinte plne. (-) = n l G q 4 Curee. Cuntwn. TWeeks

5 NAM AT PRO SCOR Cuntwn: 6 Weeks Chle hs strle 6 new business where she ships bks t her custmers. She recrs the number f bks shippe in bx n the cst t ship the bx fr her first five rers. 8.SP.1 Number f Bks Shipping Cst ($) Prt A: Cnstruct sctter plt f the t Prt B: lnterpret the sctter plt bse n the shpe f its istributin. s 2. A squre tble PQRS is mppe in crinte plne. The tble is rtte 27 clckwise but the rigin. Select whether ech sttement is true r flse. 8.G. True Flse u L l L_] The imge f pint P is P'l-4, 41. The imge f pint O is Q'(-1, 4). The imge f pint R is R'(-4, 1)" Squre PORS cn ls be mppe nt P'Q'R'S'by trnslting it 5 units left. PQRS n its imge re cngruent plygns..9.,.9 i.p Curce. Cuntwn. 6Weeks 4t

6 . Kli mps tw flwer bes in crinte plne. Use trnsfrmtins t shw tht the flwer bes re cngruent. 8.G.2 4. A twn is li ut s tht L Street n M Street re prllel. L Street n N Street re perpeniculr, s re M Street n P Street. Select ll f the sttements tht re true but the streets in this twn. 8.Gl L Street n M Street cn be mppe nt N Street n P Street by reflectin crss Min Street. N Street n P Street hve the sme slpe s L Street n M Street. N Street n P Street must be prllel. 5. Jun lerns t mke sp n stuies its ensity. He uses sctter plt t mp its vlume n mss. He mels his t with the liner equtin y = 1.25x + 1, where x is the vlume f the sp in cubic centimeters, n y is the mss f the sp in grms. 8.SP. Think Smrt fr SBAC n the ctul test, yu might be ske t use keyp with mth symbls t enter the nswer. ln this bk, yu will be ske t write the Prt A: Wht is the slpe f the line tht mels the t? Wht es it represent? nswer in the spce prvie. f =m? l 9_ : Prt B: Wht is the y-intercept? Wht es it represent? xplin why the mel es nt wrk fr very smll vlumes f sp. g p 42 Curse. Cuntwn. 6 Weeks

7 NAM AT PRO SCOR Cuntwn: 5 Weeks Abby is cllecting t fr her science fir prject but nutritin. She gthers t but the number f grms f ft n the number f clries in serving f fruit. 8.SP.1 Fruit Apple Bnn Kiwi rngel Per Strwberry Ft {9} l Clries ,n 7 s u4 2 1 Prt A: Mke sctter plt f the t. Prt B: escribe ny ptterns in the t. Ft (sl.9.,? r -9 L i =t -q) 2. AB n ffi re pltte n crinte plne. Select whether ech sttement is true r flse. 8.G.1, 8.G.1 True Flse C AB=C The imge f pint.4 reflecte crss the y-xis is (5,2). C C,48 cn be mppe nt C by reflectin n trnsltin..n be mppe nt by rttin but the rigin. Michel mps tw tringulr cuftyrs n crinte plne. Write numbers t escribe the effects f the trnsltin f AABC nt AF. Wht cn yu cnclue but these tringles? xplin. 8.G. (x,y)-(".nr.) Gur:e. Cuntwn. SWeeks 4

8 4. Luci invites 48 friens, incluing 2 bys, t prty. There re ttl f 2 wh were n time, n f thse, 18 re girls, 8.SP.4 Pqrt A: Cmplete the tw-wy tble t summrize the t. Bys Girls Ttl On Time Lte Ttl Prt B: Select ech vli cnclusin using the tble in Prt A. There re 4 mre girls wh re n time thn bys. The number f bys wh re lte is hlf the number f girls wh re lte. There re 6 guests wh re bys n re lte. O T fin the ttl number f lte guests, subtrct 2 frm 48. Think Smrt fr SBAC On the ctul test, yu might be ske t click ll f the crrect nswer chices. ln this bk. yu will be ske t she bx next t ech crrect nswer chice. 5. A cmpny pruces new key pcket tht is in the shpe f tringle. They plt the shpes n crinte plne. 8.G.4 Prt A: escribe tw sequences tht cul mp tringle ABC nt tringle ii = T Prt B: Wht cnclusin cn yu rw but the tringles? 4. q P 44 Curse. Cuntwn. SWeeks