30% Bc there are 30 boys and 90 girls or it’s 10% boys
        
             
        
        
        
Answer:
Step-by-step explanation:
First substitue the coordinates to the equation so
x=9, y=2
you would get 
2=-3/7(9) + b 
we put b because we are trying to find the new slope
multiply the two numbers above
2=-3/6/7 + b
subtract the whole number from both sides 
b= 5/6/7
in equation would be 
y= -3/7 + 5/6/7
Let me know if there is an error.
 
        
             
        
        
        
 Answer:
13.567%
Step-by-step explanation:
We solve the above question, using z score formula
 z = (x-μ)/σ, where
 x is the raw score = 23.1 ounces
 μ is the population mean = 22.0 ounces
σ is the population standard deviation = 1.0 ounce
More than = Greater than with the sign = >
Hence, for x > 23.1 ounces
z = 23.1 - 22.0/1.0
= 1.1
Probability value from Z-Table:
P(x<23.1) = 0.86433
P(x>23.1) = 1 - P(x<23.1) 
P(x>23.1) = 1 - 0.86433
P(x>23.1) = 0.13567
Converting to percentage
= 0.13567 × 100
= 13.567%
Therefore, the percentage of regulation basketballs that weigh more than 23.1 ounces is 13.567%
 
        
             
        
        
        
Answer:
D
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
To calculate m use the slope formula 
m = ( y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (3, 6) and (x₂, y₂ ) = (8, 4)
m =  = -
 = -  , hence
, hence
y = -  x + c ← is the partial equation
 x + c ← is the partial equation
To find c substitute either of the 2 points into the partial equation
Using (8, 4), then
4 = -  + c ⇒ c = 4 +
 + c ⇒ c = 4 +  =
 = 
y = -  x +
 x +  ← equation of line
 ← equation of line