The answer is 50/27 or 1 23/27 or approx 1.85185. Here is my work!
Multiply both sides by 10 : 20x + 6x = 50 - x
Collect the like terms: 20x + 6x = 50 - x
Move Variable to Left: 26x + x = 50
Collect like terms: 27x = 50
Divide both sides by 27: 50/27
Hope this helped :))
Sigma notation of sequence −10, −13, −16, … is 
<h3><u>Solution:</u></h3>
Need to determine the sigma notation for the following sequence
−10, −13, −16, …
Let's try to build a generic formula for given sequence
The given sequence is in Arithmetic progression where first term = -10 and common difference = -3
<em><u>The formula for arithmetic progression is given as:</u></em>

Where,
is the nth term in the sequence
is the first term in the sequence
d is the common difference between the terms
Here in this sequence
= -10 and d = -3

So generic formula for a term is – ( 3n + 7 )

And so on
<em><u>Using sigma notation for arithmetic sequence:</u></em>

So for first six terms value of n will vary from 1 to 6 and in sigma notation it can be represented as

Answer:
1. 70
2. 54
3. 54
4. 40
Step-by-step explanation: