A beach forms when waves deposit sand and gravel along the shoreline. and pebbles. Over time they are worn smooth from being rolled around by waves. The rocks usually reflect the local geology.

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Shen drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 9 hours. When Shen drove h

Digiron [165]

Answer:

288 miles

Explanation:

Time taken with traffic = 9 hours

Time taken without traffic = 4 hours

Speed with traffic = x mph

Speed without traffic = x+40 mph

Distance = Speed × time

Distance travelled in 9 hours

Distance travelled in 4 hours

4(x+40)

Since both the distances are same

$9x-4(x+40)=0\\\Rightarrow 9x-4x-160=0\\\Rightarrow 5x-160=0\\\Rightarrow x=\frac{160}{5}\\\Rightarrow x=32\ mph$

Speed with traffic = 32 mph

Distance travelled = 9×32 = 288 miles

∴ Shen lives 288 miles from the mountains

5 0

2 years ago