Answer:
the value of x is 2
Step-by-step explanation:
if you subtract 3 from 15 you get 12 which you then divide by 6 which leaves with with 2
Answer:
<em>The sequence is geometric.</em>
Step-by-step explanation:
In Arithmetic sequence, there is a common difference between any two consecutive terms but in Geometric sequence, there is a common ratio between any two consecutive terms.
Given sequence is: 50, -50, 50, -50,.................
Lets assume, the terms as 
<em><u>Checking for common difference:</u></em>

As there is no common difference, so it's not an arithmetic sequence.
<u><em>Checking for common ratio</em></u>

As there is a common ratio, so it's a geometric sequence.
Answer:
Janet has coins worth 252.5, 101, and 50.5.
Step-by-step explanation:
Let us call the three coins
, and
.
The first coin
is 5 times another coin<em> (let's say </em>
); therefore,
,
and the third coin is 2 times the value of another coin<em> (it's coin </em>
<em>):</em>
<em />
<em>.</em>
The total worth of all coins is 404; therefore,

or



with the value of
in hand, we find
and
:


and for 


Thus, Janet has 3 coins worth 252.5, 101, and 50.5.
638272 is the radius I think