Suppose

is the number of possible combinations for a suitcase with a lock consisting of

wheels. If you added one more wheel onto the lock, there would only be 9 allowed possible digits you can use for the new wheel. This means the number of possible combinations for

wheels, or

is given recursively by the formula

starting with

(because you can start the combination with any one of the ten available digits 0 through 9).
For example, if the combination for a 3-wheel lock is 282, then a 4-wheel lock can be any one of 2820, 2821, 2823, ..., 2829 (nine possibilities depending on the second-to-last digit).
By substitution, you have

This means a lock with 55 wheels will have

possible combinations (a number with 53 digits).
Answer:
The answer is 4.
Step-by-step explanation:
2(1 - 3y) - 13x
2(1−(3)(−9))−(13)(4)
56-52
=4
Answer:
-50
Well to get the answer of the product of a number and 9 is -450. You must divide 9 by -450 using long divison.
The answer is : It is more than the number of student who prefer movies and picnics combined.
!!HOPE THIS HELPS!!
The answer is B) -x^2-3
This is because you have an exponential graph that is flipped, hence the negative sign, and down 3.