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Lisa [10]
3 years ago
11

Write a system of equations using x and y in each for the following

Mathematics
1 answer:
vlada-n [284]3 years ago
4 0
1) x+y = 170
x-y = 26

2) Subtract the two equations from each other. Doing this you get 2y = 56. 
So the value of y is 28. Then plug in the value of y into any of the two equations and solve for x.

x-28 = 26
x = 54

3) When writing solutions as an ordered pair, the x value always comes first followed by the y value. So it would be (54, 28). 
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3 0
2 years ago
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
Yuri [45]

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From this info, we can obtain the actual speed,v_g on level ground as:

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t=d/s\\=45/90\\=0.5h

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4 0
3 years ago
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