miranda
  • miranda
Solve the compound inequality 30 < 10u < 120
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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amistre64
  • amistre64
divide everything by 10 to get "u" all by itself
amistre64
  • amistre64
3< u <12; or in notations (3,12)
amistre64
  • amistre64
if you ever have to multiply or divide by a negative number; you need to reverse the signs.... thats the only caveat

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amistre64
  • amistre64
for example: we know that 5<8. if we multiply that by (2) we get: 10<18 which is a true statement. but if we multiply by (-2) and dont flip the signs we get: -10<-18 which is a false statement; in order to "correct" it we simply reverse the inequality symbol to "make" it true. -10 > -18

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