put the equation 2x - y = 16 in the form of y = mx + c
2x - y = 16
2x = 16 + y
y = 2x - 16
the slope of this line is 2. the slope of a line perpendicular to it would be the negative reciprocal of 2. in other words, it would multiply with 2 to give -1.
you can form this equation with that info
2x = -1
x = -1/2
OR
you can flip and change the sign (numerator) of 2/1 
2/1
= -1/2
 
        
             
        
        
        
The answer is 1.72 and it would be 2 if u estimated
        
                    
             
        
        
        
Answer:
m∠b = 35°
m∠c = 145°
m∠ d = 35°
Step-by-step explanation:
To find m∠b, we use Definition of Supplementary Angles:
180 - (90 + 55) = 35°
To find m∠c, we also use Definition of Supplementary Angles:
180 - 35 = 145°
To find m∠d, we use Vertical Angles Theorem:
m∠b = m∠d = 35°
 
        
                    
             
        
        
        
Answer:
We accept  H₀   with the information we have, we can say level of ozone is under the major limit
Step-by-step explanation:
Normal Distribution
population mean  =   μ₀   =  7.5   ppm
Sample size     n   =  16      df  =  n  -  1  df  =  15
Sample mean      =    μ   =  7.8  ppm
Sample standard deviation   =  s  =  0.8
We want to find out if ozono level, is above normal level that is bigger than 7.5
1.- Hypothesis Test
null hypothesis                          H₀         μ₀   =  7.5 
alternative hypothesis             Hₐ          μ₀  >  7.5   
2.-Significance level    α  =  0.01   we will develop one tail-test (right)
then   for   df  =  15    and    α =  0,01   from t -student table we get
t(c)  = 2.624
3.-Compute  t(s)
t(s)  =  (  μ -  μ₀ ) / s /√n            ⇒   t(s)  = ( 7.8  -  7.5 )*4/0.8
 t(s)  = 0.3*4/0.8
 t(s)  = 1.5
4.-Compare   t(s)   and  t(c)
t(s)  <  t(c)       1.5  <  2.64
Then  t(s) is inside the acceptance region. We accept  H₀