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stepan [7]
3 years ago
8

Two trains, train A and train B, weigh a total of 251 tons. Train A is heavier than Train B. The difference of their weights is

181 tons. What is the weight of each train?
Mathematics
1 answer:
olga55 [171]3 years ago
3 0
Train A weighs 181 tons and train B weighs 70 tons.
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Problem:
find line perpendicular to 4x+7y+3=0 passing through (-2,1).

Solution:
We will first find the general form of the perpendicular line.
The perpendicular line has the form
7x-4y+k=0 .........................(1)
by switching the coefficients of x and y, and switching the sign of one of the two coefficients.  This way, the slope of (1) multiplied by that of the original equation is -1, a condition that the two lines are perpendicular. The value of k is to be determined from the given point (-2,1).

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5 0
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