2007-10-26 12:50:06 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
The formula:
d = a (n) - a (n - 1)
So, d (1) = x - 127.5
Next, d (2) = 184.5 - x
From an arithmatic sequence, d (1) = d (2).
So, x -127.5 = 184.5 - x
Collect x:
x + x = 184.5 + 127.5
2x = 312
x = 156
So, the answer is x = 156.
2007-10-26 13:12:53 · answer #1 · answered by Nizam89 3 · 0⤊ 0⤋
X = 156
Because you're finding the number between 127.5 and 184.5 in the sequence.
All you have to do is add the 2 numbers up and divide by 2.
Which is also finding the mean/average.
127.5 + 184.5 = 312
312/2 = 156 = x
To find how much it's changing by, subtract 156 - 127.5 or 184.5 - 156
Which equals 28.5.
127.5 + 28.5 = 156
156 + 28.5 = 184.5
2007-10-26 19:56:35 · answer #2 · answered by Tiffany T 2 · 0⤊ 0⤋
156 is the answer.
127.5 + 184.5 = 312
312/2 = 156
2007-10-26 19:53:21 · answer #3 · answered by Will 3 · 0⤊ 0⤋
156
2007-10-26 19:53:12 · answer #4 · answered by †Lawrence R† 6 · 0⤊ 0⤋
156=x
2007-10-26 19:54:39 · answer #5 · answered by zakariya93 1 · 0⤊ 0⤋
We're not here to do your homework. If there is a specific problem about sequences you don't understand, bring it up here. You have about 4 different questions in this section.
2007-10-26 20:06:52 · answer #6 · answered by cattbarf 7 · 0⤊ 1⤋
155.5 ?
2007-10-26 19:55:19 · answer #7 · answered by Brian 4 · 0⤊ 1⤋