Answer:
4. 158
Step-by-step explanation:
First let's make things a little simpler and put these arcs in terms of x.  We know that the degree measure around the outside of a circle, regardless of its size, is 360.  So let's say that arc BC is x.  That means that arc BDC is 360 - x.  This is because arc BC + arc BDC = 360.  Substituting in our x's we have:
x + 360 - x = 360 and
360 = 360.  (That's just the proof that putting in our x's as we did does in fact work!)
Following the formula then, we have
 and
 and

Multiply both sides by 2 to get rid of the fraction and get
44 = 360 - 2x
Subtract 360 rom both sides to get
-316 = -2x
Divide both sides by -2 to get that x = 158
Since we are looking for arc BC and we designated arc BC as our x, that means that arc BC = 158.
 
        
             
        
        
        
Twice (2 times) the difference (subtraction) of a number (y) and 7 equals 3.
2*(y-7) = 3
hope this helps :)
        
             
        
        
        
Then a is Half of 45 wich is 22.5 I believe. 
        
             
        
        
        
Let x represent the number of shirts. Let y represent the number of pens. 
If shirts are on sale for $11.99 each, then x shirts cost $11.99x.
If pants are on sale for $12.99 each, then y pants cost $12.99y.
The total cost is $(11.99x+12.99y).
Sarah can spend up to $65. Then an inequality that represents this situation is
11.99x+12.99y≤65 (this inequality holds when Sarah can spend $65 too)
or 
11.99x+12.99y<65 (this inequality holds when Sarah can spend less than $65).
 
        
             
        
        
        
Answer:
Step-by-step explanation:
183.5