Answer:
The 13th term is 81<em>x</em> + 59. 
Step-by-step explanation:
We are given the arithmetic sequence: 

And we want to find the 13th term.
Recall that for an arithmetic sequence, each subsequent term only differ by a common difference <em>d</em>. In other words: 

Find the common difference by subtracting the first term from the second: 

Distribute: 

Combine like terms. Hence: 

The common difference is (7<em>x</em> + 5). 
To find the 13th term, we can write a direct formula. The direct formula for an arithmetic sequence has the form: 

Where <em>a</em> is the initial term and <em>d</em> is the common difference. 
The initial term is (-3<em>x</em> - 1) and the common difference is (7<em>x</em> + 5). Hence: 

To find the 13th term, let <em>n</em> = 13. Hence: 

Simplify: 

The 13th term is 81<em>x</em> + 59. 
 
        
             
        
        
        
Answer:
3.
Step-by-step explanation:
4$ = 1 pack
(think: what times 4 is 12? 3! so we need to muliply both sides of the equal sign by 3, so we can turn the 4 into a 12. Remember, what you do to on side, you must do to the other. )
4$ = 1 pack
*3  *3
12$ = 3 packs
so your answer is 3.
 
        
                    
             
        
        
        
The equation is given as

<h3>The Amplitude </h3>
The Amplitude can be calculated as

<h3>The Vertical Shift</h3>
The vertical shift is the average difference between the maximum and minimum.

For b value 
The Time Period will be twice the distance between max and min.

<h3>The Period</h3>
The period is calculated as

The equation is given as

Learn more on time period and amplitude here;
brainly.com/question/15531840
 
        
             
        
        
        
Answer:$1304.89
Step-by-step explanation:
P(1 + r/n)^r*t
500 ( 1 + 0.08/52) ∧ 52*12
500 (1.00154)^624
500 ( 2.61)
1304.88523
 
        
             
        
        
        
Answer:
irrational number, non-repeating decimal
Step-by-step explanation:
√18 = √9·√2 = 3·√2.  
√2 is an irrational, non-repeating decimal (my calculator shows it to be approx. 1.414213562..... )
and so √18 is the same.