Có bao nhiêu số có 6 chữ số lấy từ 6 chữ số 1, 2,3,4,5,6 trong đó 1 và 2 không đứng cạnh nhau?

answer: a.

step-by-step explanation: the answer is a. because, you need to converge the fractions to find a solution.

c

c

c

c

c

c

c

cc

c

step-by-step explanation:

16

step-by-step explanation:

none.

step-by-step explanation:

m

1

=

5

m1=5

b

=

−

1

b=-1

find the slope and y-intercept of the second equation.

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m

2

=

0

m2=0

b

=

−

6

b=-6

compare the slopes

m

m of the two equations.

m

1

=

5

,

m

2

=

0

m1=5,m2=0

compare the two slopes in the decimal form. if the slopes are equal, then the lines are parallel. if the slopes are not equal, then the lines are not parallel.

m

1

=

5

,

m

2

=

0

m1=5,m2=0