Answer:
Step-by-step explanation:
Total sum of degrees of a Triangle is 180 deg
Than: 8x-7 + x +7 + 2x + 15 = 180
11x + 15 = 180
x = (180-15) / 11  =15
Answer: 15
 
        
             
        
        
        
Answer:

Step-by-step explanation:
Given

Required
Write a formula
The above sequence shows a geometric sequence because:
 -- common ratio
 -- common ratio
The equation is determined using:

Where

Substitute values for a and r

Apply law of indices:





<em>The above represents the explicit formula</em>
 
        
             
        
        
        
If you were to replace the x's with 2, your equation would turn into:
(2)^2-4(2)+5
From there, you'd just solve.
4-8+5=1
Your answer would be 1.
 
        
             
        
        
        
Answer:
A. 3/2
Step-by-step explanation:
To find the lenght of the side opposing the 30° angle, you need to use trigonometry, since it's a right-angled triangle. You have your 30° angle and you have the side beside : therefore, you can use the sine :
sin(30) x 3 = ?
0,5 x 3 = ?
1,5 = ?
1,5 = 3/2
 
        
             
        
        
        
You can solve all of these by using the distance formula. I have shared it below.