Respuesta :

68 miles / hour

Average speed = distance / time

distance = 170 and time = 5/2 ( as an improper fraction)

speed = 170 ÷ [tex]\frac{5}{2}[/tex] = 170 × [tex]\frac{2}{5}[/tex] = [tex]\frac{340}{5}[/tex] = 68

[tex]v = d \div t[/tex]
[tex]v = (170 \: mi \times 1.609 \: km) \div 2.5 \: hrs[/tex]
[tex]v = 273.53 \: km \div 2.5 \: hrs[/tex]
[tex]v = 109.412 \: kmhr - 1[/tex]
The average speed is 109.412 kilometers per hour.

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