Answer:
7n-18=n+12
Step-by-step explanation:
i guess
 
        
             
        
        
        
Answer:
The measure of the third arc is 
Step-by-step  explanation:
step 1
we know that
The measurement of the external angle is the semi-difference of the arcs which comprises
in this problem
Let
x----> the greater arc of the circle intercepted by the secant and the tangent
y----> the smaller arc of the circle intercepted by the secant and the tangent

 ----> equation A
 ----> equation A

 -----> equation B
 -----> equation B
Substitute equation B in equation A and solve for y
 
 
 
 

Find the value of x

step 2
Find the measure of the third arc
Let
z------> the measure of the third arc
we know that
 -----> complete circle
 -----> complete circle
substitute the values and solve for z


 
        
             
        
        
        
There are 12 candles in each box, so the there are a total of 7 boxes
        
                    
             
        
        
        
!5% is equivalent to 15 parts over the whole 100 part. It is written in proportions as 15/100. 
Similarly, you need to find how many parts in 80 are equivalent to 15%or 15/100. So, just equate both equation with x as an unknown.
x/80 = 15/100
x = (15/100)*80
x = 12
Thus, the 15% of 80 is 12.
        
             
        
        
        
Answer: 0, 1, -3
Step-by-step explanation:
f(x) = x^3 +2x^2 -3x
f(x) = x(x^2 +2x-3)
f(x) = x(x-1)(x+3)
to find zeroes, plug into f(x) and solve for each value of x. doing this gives 0, 1, and -3