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iragen [17]
3 years ago
8

100 meters, 9.69 seconds, usain bolt jamaica

Mathematics
1 answer:
uranmaximum [27]3 years ago
6 0
10.31991744 meters per second
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svetlana [45]

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Use the substitution method to determine the solution of the system of equations. y = -5x and 21x - 7y = 28
8_murik_8 [283]

Answer:

x = 1/2   y = -5/2

Step-by-step explanation:

Since we already know an equation for y, we just need to plug it into the other equation.

21x - 7(-5x) = 28

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I4(-3)+5| +8(-3)

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