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nordsb [41]
2 years ago
13

Charlotte drives 64 mph for the first 3 hours of her trip and 92 mph for last 4 hours.

Mathematics
2 answers:
GarryVolchara [31]2 years ago
8 0
Please correct me if wrong:
64x3= 192
92x4= 368

192+368= 560

560\7= 80

Correct answer: 80
german2 years ago
6 0

Answer:

80 mph

Step-by-step explanation:

\boxed{\sf Distance=Speed \times Time}

<u>First leg of trip</u>

  • Speed = 64 mph
  • Time = 3 hours

\implies \sf Distance =64\times 3 = 192\:miles

<u>Second leg of trip</u>

  • Speed = 92 mph
  • Time = 4 hours

\implies \sf Distance=92 \times 4 = 368\:miles

\boxed{\sf Speed=\dfrac{Distance}{Time}}

To find the average speed:

\begin{aligned}\implies \sf Average\:speed & = \sf \dfrac{Total\:distance}{Total\:time}\\\\ & = \sf \dfrac{192+368}{3+4}\\\\& = \sf \dfrac{560}{7}\\\\ & = \sf 80\:mph\end{aligned}

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