Answer: -27 is the correct answer. (apparently)
Answer:
t=-105
Step-by-step explanation:

What we need to do here is to isolate t.
Let's multiply both sides by -15.

7*-15= -105
t=-105
Answer:
an = 80. 2^(n-5)
Step-by-step explanation:
r = a6/a5 =160/80 = 2
an = a5. r^(n-5)
= 80. 2^(n-5)
Answer:
15.3 dollars
Step-by-step explanation:
13.50 + (.09 x 20 = 1.8)
13.50 + 1.8