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viva [34]
3 years ago
5

A train goes twice as fast downhill as it can go uphill, and 2/3 feet as fast uphill as it can go on level ground. If it goes 12

0 miles per hour downhill, how long will it take to travel 45 miles per flat
Mathematics
2 answers:
lisabon 2012 [21]3 years ago
8 0

Answer:120/2=60 speed uphill. Speed level 3/2 uphill=90 speed downhill 120 on flat land d=45=90*t t=1/2 hrs

Step-by-step explanation:

Sergeu [11.5K]3 years ago
6 0

Answer:

Step-by-step explanation:

ion know?

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9) What 2 numbers have a total of 28 and a difference of 6?<br>​
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Answer:

Sum: 17 + 11 = 28

Difference: 17 - 11 = 6

Step-by-step explanation:

The sum of x and y is 28. In other words, x plus y equals 28 and can be written as equation A:

x + y = 28

The difference between x and y is 6. In other words, x minus y equals 6 and can be written as equation B:

x - y = 6

Now solve equation B for x to get the revised equation B:

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Then substitute x in equation A from the revised equation B and then solve for y:

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Now we know y is 11. Which means that we can substitute y for 11 in equation A and solve for x:

x + y = 28

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X = 17

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Sum: 17 + 11 = 28

Difference: 17 - 11 = 6

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