For
the derivative is negative.
For
the derivative is positive.
Therefore at
there's a minimum.
The number of permutations of objects from objects is .
The number of ways of choosing 3 digits from 6 digits without replacement ( order is important) is . This is the number of all possible permutations of choosing 3 from 6.
Correct choice is 120.
SOLUTION:
Let the unknown number = x
2 ( x + 1 ) = 4x - 6
2x + 2 = 4x - 6
2x - 4x = - 6 - 2
- 2x = - 8
x = - 8 / - 2
x = 8 / 2
x = 4
FINAL ANSWER:
Therefore, the unknown number is 4.
Hope this helps! :)
Have a lovely day! <3
The cost of one can of tuna is $1.50/3, or $0.50 per can.