Answer:
(0,-4)
Step-by-step explanation:
To find T, you add 25 to both sides, isolating the varible. This gives you T=-19
Hope this helped!
Answer:
I <em>believe </em>it would be 4:7 books (the 4 new ones : the 7 older books).
Hope this helps!
Standard formula for arithmetic sequence:
an = a0 + d(n-1)
if we use the two terms given, setting a12 as starting term and a45 as the end term an.
170 = 38 + 33d
170 - 38 = 33d
132 = 33d
132/33 = d
This is the common difference, use it to find the first term.
38 = a0 + (132/33)(12-1)
38 = a0 + (132/33)(11)
38 = a0 + 132/3
38 - 132/3 = a0
38 - 44 = a0
-6 = a0
The starting term is -6
The rule is 3^x.
Check: 3^1 = 3; 3^2 = 9; 3^3 = 27 and 3^4 = 81
