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lulu5351
06.11.2019 •
Mathematics
It took amir 2 hours to hike 5 miles. on the first part of the hike, amir averaged 3 miles per hour. for the second part of the hike, the terrain was more difficult so his average speed decreased to 1.5 mile per hour. which equation can be used to find t, the amount of time amir spent hiking during the second, more difficult part of the hike?
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Ответ:
x = 2 - t
And:
3 x + 1.5 t = 5
The equation is:
3 * ( 2 - t ) + 1.5 t = 5
We can also solve this equation:
6 - 3 t + 1.5 t = 5
1.5 t = 1
t = 0.66 h = 2/3 h = 40 min.
Ответ:
10 and -12
Step-by-step explanation:
10x-12=-120
it said it needed to be 20 characters long. so this is me making it that