Answer:
CD= 15.03
Step-by-step explanation:
x1=7, x2= -8
y1=-4, y2=-5
 
 distance CD= √(x2- x1) 2+ (y2-y1)2
 = √( -8-7)2 + [-5-(-4)]2
 = √(15)2+ (-5+4)2
 = √225+ (1)2
 = √225+1
 = √226 
 = 15.03
 
        
             
        
        
        
Answer:
(-7,-4)
Step-by-step explanation:
There are 2 different ways to solve a system of equations and the one I'm going to show you will work for all systems.  To start we will solve one of the equations for either X or Y it doesn't matter which one so I will choose the second one.  Divide both sides by negative 4 and you will have the solved equation.  x=1+2y Now we know what x equals so we can plug "1+2y" into the other equation where we see an X and we will get -8(1+2y)=24-8y and since we only have one variable now we can solve to get what Y is.  The first step is distributing -8-16y=24-8y now lets put the Y's together on one side and the numbers together on the other -32=8y and just divide both sides by 8 to get the value of Y -4=y  Now that we have Y we can plug -4 into either equation as Y to get the value of X I will use the second equation.  -4x=-4-8(-4) and solve for X -4x=-4+32  -4x=28  x=-7 So now we have x and y and we can write it as out solution (-7, -4)
I hope this helps and please don't hesitate to ask if there is anything still unclear!
 
        
                    
             
        
        
        
C) 1/2 a cup for one serving, also the smaller one.
D) i dont know this one, but the answers for C are for sure correct
        
                    
             
        
        
        
Answer: At most 9  attendees can be there.
Step-by-step explanation:
Given equation:<em> d = 8a</em> , where <em>a</em> represents the number of attendees, and the variable <em>d </em>represents the cost in dollars. 
To find : the number of attendees, if Will budgets a total of $72 for his graduation picnic.
72=8a
⇒ 9 = a  [divide both sides by 8]
∴ a= 9
Hence, at most 9  attendees can be there.
 
        
             
        
        
        
Answer:
26.6 but that is not one of yor answers...
I think you have a typo in "A"
I think that your have a typo in the answers 
x/sin(40) = 32/sin(90)
x = 26.6
Step-by-step explanation: