It is beans and Obama 3+8 and u have to simplify for negative
        
             
        
        
        
ANSWER
The correct answer is C  .
.
<u>EXPLANATION</u>
We have 

and
 .
.
We solve the two equation simultaneously by elimination method. We need to be smart and eliminate y, since we are looking for  .
.
We first multiply equation (2) by 2
 .
.
We add equation (3) and (1). 
 .
.
Dividing through by 6 gives
 .
.
 
        
             
        
        
        
Answer:
1. 0.5
2. 0.25
3.  0.33333...
4.  0.2
5.  0.75
6. 0.666...
7. 0.4
8. 0.375 
9. 0.444...
10. 0.28571428571429
Step-by-step explanation:
 
        
             
        
        
        
(1) QS bisecting <PQR implies <PQS = <SQR
(2) <PQS=45 deg and (1) imply <SQR also = 45 deg
(3) from (2) it follows that <PQR = <PQS + <SQR = 45 + 45 deg = 90 deg and therefore the triangle is right-angled