Answer:
A. Line a and line b
Step-by-step explanation:
Let x be the length of the train.
On the basis of the observer;
Speed of the train = x/6
On the basis of the bridge;
Total distance covered by any point of the train= 350+x
Speed = (350+x)/20
Equating the two expressions of speed;
x/6 = (350+x)/20
20(x) = 6(350+x)
20x = 2100+6x
(20-6)x = 2100
14x = 2100
x= 2100/14 = 150 m
Speed = x/6 = (350+x)/20 = 150/6 = 500/20 = 25 m/s.
Therefore,
Length of train = 150 m
Speed of train = 25 m/s
A = 34 x 2 = 68
b = 56/2 = 28
hope it helps
Answer:
the third option: g(x) = 5^x - 9
Step-by-step explanation:
identify the y-intercept, which is (0, -9)
find the option with: y = mx - 9
↑ the y-intercpet
La repuesta es “x = 7”.
9x + 8 = 11x - 6
-9x -9x
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8 = 2x - 6
+6 +6
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14 = 2x
__ __
2 2
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7 = x
