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sergij07 [2.7K]
3 years ago
6

What's the equivalent expression of 2a+6+1

Mathematics
1 answer:
sineoko [7]3 years ago
6 0

Answer:

2a + 7

Explanation:

2a + 6 + 1

6 + 1 = 7

2a + 7

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a ship sails 20km due north. It changes direction and then sails 15 due east. How far is it from its starting point? ​
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The planning committee at school has 10 members. Exactly four of these members are teachers. A four-person subcommittee with at
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Answer:

865

Step-by-step explanation: The set of possibilities are:

Subcommittee  is of 4 people according to:

4  teachers    0 other member       total possibilities    1

3  teachers     1     teachers  C₄,₃  = 4   and  other member  6    6*4   =  24

2 teachers     2      C₄,₂  =  4!/2!  = 12    2 (om)    and  C₆,₂   =  6!/4!  = 30

30*12  = 360

1  teacher        3     (om)               4         and  C₆,₃ = 6!/3!   =  120

120*4  = 480

Total ways of committee    1  + 24  + 360 +  480  = 865

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