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salantis [7]
2 years ago
15

. Fast train gets from the starting to the final station in 4 hours and 20 minutes. The slower local train, whose average speed

is 30 km/h lower, is able to make the same journey in 7 hours and 40 minutes. What is the speed of the fast train and what is the speed of the local train ?
Mathematics
1 answer:
madreJ [45]2 years ago
3 0

Answer:

Fast train speed: 69 km/h

Slow train speed: 39 km/h

Step-by-step explanation:

Fast train:

-Time: 4.33

-Speed: x

-Distance: 4.33x

Slow train:

-Time:  7.66

-Speed: x - 30

-Distance: 7.66(x - 30)

7.66(x - 30) = 4.33x

7.66x - 229.8 = 4.33x

3.33x = 229.8

x = 69

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Step-by-step explanation:

8 0
2 years ago
What are the missing coordinates? My teacher said it was (h-m,n), but I’m saying it is (h+m,n). Could anyone help?
antiseptic1488 [7]

Answer:

  • <u>You are right, the coordinates are</u>:

                                                               (h+m,n)

Explanation:

Here is how you can proove that you are right.

Note that m is the x-coordinate of the point   (m,n) . Since this point is to the left of the y-axis, it is a negative number, but the negative sign is included in m.

The distance from   (m,n)   to the y-axis is not m but -m.

That is the same distance from the point with the missing coordinates to the point (h,0).

Then, the missing x-coordinate is    h-(-m)=h+m.

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Hence, the missing coordinates are x = h+m, and y = n: (h + m, n).

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2 years ago
What is different between solving inequalities and absolute value inequalities?
Ivenika [448]

Answer:

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|a|

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An absolute value equation is an equation that contains an absolute value expression. The equation

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The inequality

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|ax+b|<c,wherec>0

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=ax+b<−corax+b>c

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When solving an absolute value inequality it's necessary to first isolate the absolute value expression on one side of the inequality before solving the inequality.

Step-by-step explanation:

Hope this helps :)

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Step-by-step explanation:

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(n+1)x 2=10 
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