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nadezda [96]
3 years ago
6

35 points!! Only comment if you really know the answer please.

Mathematics
1 answer:
hodyreva [135]3 years ago
5 0
Y = 3x - 1 ---- (1)
x - y = -9  ---- (2)

From Equation 2:
x - y = - 9
x + 9 = y 
y = x + 9 --- (2a)

(1) - (2a):
0 = 3x - x - 1 - 9
0 = 2x - 10
2x - 10 = 0
2x = 10
x = 5 ---- sub into (1)

y = 3(5) - 1 
y = 15 - 1
y = 14 

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Answer:

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Step-by-step explanation:

  speed = distance / time

The rate downriver is (60 mi)/(3 h) = 20 mi/h.

The rate upriver is (60 mi)/(5 h) = 12 mi/h.

The rate of the boat in still water is the average of these:

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The rate of the current is the difference between the boat speed and actual speed:

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A man travels 13.2 by train, 45.07 by bicycle, and 17.2 by car. How far did he 5 travel?​
Nuetrik [128]

Answer:

75.47

Step-by-step explanation:

<em>Hey there !!!!!</em>

<em>to, see how much did the man travel in total. you just add all of the distances that the man traveled.</em>

<em>he traveled:</em>

<em>13.2  by tairn</em>

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<em>17.2 by car </em>

<em>if you add all of them up :</em>

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