Linabdul Linabdul
  • 08-09-2016
  • Mathematics
contestada

Let P be a point between points S and T on ST If ST = 21, SP = 3b – 11, and PT = b + 4, solve for b.

Respuesta :

94infinity
94infinity 94infinity
  • 08-09-2016
ST=21, SP=3b-11, PT=b+4
ST=SP+PT
21=(3b-11)+(b+4)
21=3b-11+b+4
21=3b+b-11+4
21=4b-7      |+7
21+7=4b
4b=28         |/4
b=28/4
b=7
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