First term: a1 = 151
common difference: d = -14 (we decrease by 14 each time, eg, 151-14 = 137)
nth term of this arithmetic sequence is...
an = a1+d(n-1)
an = 151+(-14)(n-1)
an = 151-14n+14
an = -14n+165
This will be used in the formula below
Sn = n*(a1+an)/2
<span>Sn = n*(151+(-14n+165))/2
</span><span>S26 = 26*(151+(-14*26+165))/2 ... replace every n with 26
</span>S26 = -624
The final answer here is choice C) -624
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Answer:

Step-by-step explanation:

[we transposed]
I think thats it
The greatest common factor is 8 so if you dived both parts of the fractions by 8 you get the simplest form. 48/200 ==> 6/25
Answer: 6/25
Step-by-step explanation:
nm=16
m=16/n
m=16/8
m=2
x = 125
Multiply both sides by 5:
x/5 X 5 = x
and
25 X 5 = 125
so you're left with:
x = 125
Hope this helps