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inna [77]
3 years ago
12

HELP PLEASE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
aleksandrvk [35]3 years ago
5 0

50km to 80km is 30km

10c to -80c is -90c

and since it linear (Which means the change is constant or the same)

every 10 km show a -30c decrease

so

60 km is -20c

70km is -50c


answer is c

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Answer: e=-50|t-40|+2000

The cable car’s elevation will be 750 feet after 15 minutes or 65 minutes.

Step-by-step explanation:

Given: A cable car begins its trip by moving up a hill. As it moves up, it gains elevation at a constant rate of 50 feet/minute until it reaches the peak at 2,000 feet.

Then, total time taken to reach the peak = (Distance) ÷ (speed)

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Then, as the car moves down to the hill’s base, its elevation drops at the same rate.

The equation that models the cable car’s elevation, e, after t minutes is

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e=-50|t-40|+2000

When the cable car’s elevation will be 750 feet after minutes, then we have

750=-50|t-40|+2000\\\\\Rightarrow\ -50|t-40|=750-2000\\\\\Rightarrow\ -50|t-40|=1250\\\\\Rightarrow|t-40|=-\dfrac{1250}{50}\\\\\Rightarrow|t-40|=-25\\\\\Rightarrow t-40=-25\text{ or }t-40=25\\\\\Rightarrow t=-25+40\text{ or }t=25+40\\\\\Rightarrow  t=15\text{ or }t=65

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Step-by-step explanation:

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Hope this helps!
</span></span></span>
6 0
4 years ago
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