Answer:
56 gallons
Step-by-step explanation:
When her gas tank is full, she has x gallons in the tank. 
when she went to the gas station, she had (5/8) of x gallons of gas in her tank. she added 21 gallons into her tank, then she had x gallons in her tank. 
(5/8)x + 21 = x
subtract x and 21 from both sides 
(5/8)x - x = -21
factor out an x from the left side 
x(5/8 - 1) = -21
simplify the parenthesis
x(-3/8) = -21
multiply both sides by -8/3
x= 56 gallons
 
        
             
        
        
        
Cot=cos\sin
sec=1\cos
cosx\sinx÷1\cosx=
cos^2x\sinx=1-sin^2x\sinx=
1\sinx-sin^2x\sinx= 1/sinx-sinx
        
             
        
        
        
Answer:
its an isosceles triangle 
Step-by-step explanation:
 
        
             
        
        
        
If the probability of selecting a red ball is 0.83, which is greater than 0.5, it is likely that a red ball is selected.
Answer: letter A