Since x=8y, subsitute 8y for x in other equation
y=6x-11
y=6(8y)-11
y=48y-11
minus y both sides
0=47y-11
add 11 to both sides
11=47y
divide both sides by 47

subsitute taht for y to find x
x=8y




in (x,y) form
(x,y)
 
 
        
        
        
Answer:
n = 16
Step-by-step explanation:
 
        
                    
             
        
        
        
Let x = times in the pool
Let y = times in the basketball courts
42=3x+5y
x+y=12
Therefore y = 12-x
Subsitute for y
42 = 3x + 5(12-x)
42 = 3x + 60 -5x
Subtract 60
-18 = -2x
9 = x
The person used the pool 9 times.
        
             
        
        
        
Answer:
7 ounces.
Step-by-step explanation:
35 divided by 5 = 7.
 
        
             
        
        
        
Answer: 0.87 times per second  (Or 52.2 times per minute)
Step-by-step explanation:
 You need to make the conversion from minutes to seconds.
 Remember that 1 minute has 60 seconds. Then 20 minutes to seconds is:
 
 Find the number of times the heart beats in 1 second when it is rowing:
 
 Find the number of times the heart beats in 1 second when it is resting:
 
 Then the difference is:
 
 (Or 52.2 times per minute)