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jenyasd209 [6]
2 years ago
5

Find all x ∈ Z satisfying each of the following equations.3x = 2 (mod 7)

Mathematics
1 answer:
Vlada [557]2 years ago
5 0

Answer:

7x−3=7k,x=7k+3,k∈ℤ

Step-by-step explanation:

3x ≡ 2 (mod 7)

3 is a solution, since 3×3−2=7.

All solutions are 3+7ℤ

y=3x−2/7=3(x−3)+7/7=3(x−3)/7+1

7x−3=7k,x=7k+3,k∈ℤ

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20 points help w part b
Hatshy [7]

Answer:

8:07 am

Step-by-step explanation:

It takes 9 minutes to walk from his house to the bus station.  It then takes 92 minutes for the bus to travel from Birmingham to Coventry.  After arriving, he takes 12 minutes to reach his workplace.  This takes a total of 113 minutes.

9 + 92 + 12 = 113

Convert 113 minutes to hours and minutes.

113 - 60 = 53

1 hr and 53 min

He has to be at work by 10.  Subtract the time it takes to get to his work by the time he has to get there.

10 - 1 hr = 9

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The latest time he can leave is 8:07.

3 0
3 years ago
Subtract -2k3 + k2 - 9 from 5k3 - 3k + 7.
tankabanditka [31]
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15k-3k+7+6k-2k+9
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answer: 18k+18
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both forms are right
8 0
3 years ago
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Answer:

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Answer:

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