Answer:
Olga's mistake was in Step 3 because she divided the entire equation by 3 instead of dividing it by 1/3.
 
        
             
        
        
        
Let named variables as you said g- guinea pigs and c- chinchillas
System of equation is:
First is:   c+ g = 60,005 
Second is:   c= 2g+5
When we replace second in first we get:
2g+5+g = 60,005 => 3g+5= 60,005 => 3g= 60,000
g=60.000/3 = 20,000 => g=20,000
When this result we replace in the second equation we get
c= 2 * 20,000 +5= 40,000+5 = 40,005
c= 40,005
Good luck!!!!
        
             
        
        
        
Well number one is an acute angle number two is obtuse and number three is obtuse 
        
             
        
        
        
Answer:
1:4
Step-by-step explanation:you can simplify the ratio by finding the LCM on both sides and dividing the number by the lcm in which this case is 15.
15/15=1
60/15=4
so 1:4