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  1. 1) 28 x + 15 y =131 and x+y =7, so x = 7-y Plug x into first equation:28(7-y)+15y=131, so 196 -28y +15y=131, so -13y=-65, so y=5 If y =5, than x= 2 2)x+y =13, so x=13-y and 2x+4y=40 3)x+y=10, so x=10-y, and 4x+2y=36 4)x+y=7, so x=7-y and 5x+45y=195 For 2-3-4, just do the math as in example#1.

    1 Answers · Science & Mathematics · 05/04/2013

  2. ...or may not work with the seats you already have! GREAT advice from a CPST at http://www.car-seat.org : 1. don t assume. A big car seat may fit in a...

    5 Answers · Pregnancy & Parenting · 18/09/2008

  3. ...bet. Most often they have one of the officers trained as a CPST (child passenger safety technician) or will know how to direct you to one. Just out...

    10 Answers · Pregnancy & Parenting · 10/06/2007

  4. ... research, pick out a seat, buy it, schedule an appointment with a CPST (child passenger safety technician - call your local police station) and get it in...

    14 Answers · Pregnancy & Parenting · 19/02/2009

  5. ... child's car seat checked by a child passenger safety technician ( CPST ). One can be found at http://www.seatcheck.org/ There are...

    5 Answers · Pregnancy & Parenting · 25/08/2012

  6. ... misinformed. If you want actual info- you need to see a CPST (child passenger safety technician) as they will have the info for you. You can find...

    6 Answers · Pregnancy & Parenting · 22/12/2012

  7. ...you're asking how to put your car seat in your car, see a CPST (child passenger safety technician) call your police station they should be able to direct...

    3 Answers · Cars & Transportation · 24/08/2007

  8. ... key-co) Keyfit22 or Keyfit30 are CPST (child passenger safety tech) favorites. The Keyfit22 and ...

    4 Answers · Pregnancy & Parenting · 31/05/2008

  9. ...a very detailed article written by a child passenger safety technician ( CPST ) on how to conduct the 5 step test: http://carseatblog.com/3966/the-5-step-test/ Most...

    5 Answers · Family & Relationships · 19/07/2012

  10. ... child's car seat checked by a child passenger safety technician ( CPST ). You can find a CPST in your area at http://www.seatcheck.org...

    1 Answers · Cars & Transportation · 05/06/2012

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