Attached solution with detailed work using compound interest formula.
 
        
        
        
Hello :
<span>7979 °=360°× 22 + 59°
</span><span> the complement of a 7979degrees° is : x
x+</span>59°=180°
x= 180°-59° =121°
        
                    
             
        
        
        
Answer:
1.) D
2.) C
Step-by-step explanation:
 
        
             
        
        
        
Answer: C. 

Step-by-step explanation:
If 't' represents the number of hours Joanne tutors and 'r' represents the number of hours she works as a receptionist.
Then the total hours she can work=t+r
Since she can work up to 25 hours.
Thus 
If she earns $25 per hour by tuition and $ 12 per hour by working as a receptionist .
Then her total earning =$
Since she must earn $200.
Then  .
.
Therefore, the required system of inequality will be


 
        
                    
             
        
        
        
This is the concept of proportionality, we are required to calculate for the number of hours two crews can use to paint the house altogether.
Here proceed as follows;
number of hours new crew can paint=12 hrs
portion of work painted by new crew in 1 hour= 1/12
number of hours experienced crew can paint=6 hours
Portion of work painted by experienced crew in 1 hour=1/6
Portion of work painted by the two crews altogether in 1 hour will be:
1/6+1/12=1/4
thus the total amount of hours that the two painters will take to paint will be:
4 hours