Answer:
(3,-1) 
Step-by-step explanation:
So we have the system of equations: 

As directed, add straight down. The y-variable will cancel: 

Now, divide both sides by 5. The left cancels: 

So x is 3. 
Now, substitute 3 for x in either of the equations: 

Substitute 3 for x: 

Multiply: 

Subtract 9 from both sides: 

So, our answer is: x=3, y=-1 or (3,-1). 
And we are done :)
 
        
             
        
        
        
Answer:
74t + 65= total cost
Step-by-step explanation:
74 is the amount per hour, so you would need to multiply that by the number of hours they work (74t) and the 65 is a set fee (does not change based on the amount of service) so you just add that on
 
        
             
        
        
        
Answer:
 or
 or 
Step-by-step explanation:
first use the y2-y1/x2-x1 formula then use y=mx+b after
plug in 2 for y2 and -1 for y1
plug in -5 for x2 and 5 for x1
 =
=
2+1=3
-5-5=-10 
 is ur slope
 is ur slope
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this is the y=mx+b formula *extra info ig*
i usually use the first point for this but u can use watever point u want
plug in 5 for x 
plug in -1 for y 
and plug -3/10 for m
-1=-3/10(5)+b
-3/10*5=-3/2
-1=-3/2+b
add -3/2 on both sides 
-1+3/2=1/2
1/2=b and b is ur y-intercept
y=-3/10x+1/2
hope this helps 
 
        
             
        
        
        
The answer will be amount of mass in a certain volume .