Acar tracked 640 miles at a certain speed. if the speed of had been 8 mph faster, the trip could have been made in 4 hours less time. find the speed.

Step-by-step explanation:

Distance = rate × time, or  

d=rt, so

         Let x = original speed.

Then x + 8 = faster speed

       Let t₁  = time at original speed

      And t₂ = time at faster speed

    Then t₂ = t ₁ - 4

Check:

OK.

these sign is used to tell weather the number is greater or less than the number   <   or >     but this sign means its equal =    

hope this you and

step-by-step explanation:

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step-by-step explanation: