The first t-shirt you buy costs $7, and every additional shirt costs only $5. let f(n) be the total cost of n shirts. f is a sequence. what kind of sequence is it?

f(n) = 2 + 5n. This is an arithmetic sequence.

Step-by-step explanation:

f(1) = 7

f(2) = 7 + 5

f(3) = 7 + 5 + 5 = 7 +10

f(4) = 7 + 5 + 5 + 5 = 7 + 15

In general,

f(n) = 7 + 5(n -1 )

        = 7 + 5n - 5

        = 2 + 5n

We have the sequence 7, 12, 17, 22, 27 …

This is an arithmetic sequence, because it is a sequence of numbers in which the common difference between consecutive terms is 5.

an altitude of 15,000 feet

step-by-step explanation:

answer is 144

step-by-step explanation: