A cell phone provider offers a plan that costs $20 per month plus $0.20 per text message sent or received. A comparable plan costs $50 per month but offers unlimited text messaging.

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Step-by-step explanation:

0.2X+20=50

0.2x=10

5(0.2x)=5(10)

x=50

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step-by-step explanation:

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles