Answer:
f(d) = 2900 - 20d
Step-by-step explanation:
We start with 2,900 and each week 20 is deducted from the account.
f(d) = 2900 - 20d
The answer is 29.13. 27.63 + 1.5 = 29.13
The missing X value equals 5. The triangle was dilated by a scale factor of 3 and 15 / 3 = 5.
The total number of permutations is the product of the number of options for each choice:

For the first position there are 13 choices, for the second 12 and so on. This pattern holds until the last spot which we are told must be one of the 12 pitchers. Thus:

