Hey there!
Here is your answer:
<u><em>The proper answer to this question is "44 times".</em></u>
Reason:
You have to solve it this way:
<u><em>12 heartbeats=16 seconds</em></u>
<u><em>16+16=32</em></u>
<u><em>36+16=48</em></u>
<u><em>48+16=64</em></u>
<u><em>16-12=4</em></u>
<u><em>12+12=36+8=44</em></u>
<em>Therefore lions heart beats 44 times every 60 seconds.</em>
If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit
        
             
        
        
        
You mean, what is this number? 
we can rephrase it like this: the sum of a number x and 8 is 15
which is: 
x+8=15
we subtract 8 from both sides and we get
x=7
so the answer is 7.
        
                    
             
        
        
        
These are the steps needed for this question hope this helps if there is any more questions do feel free to ask them
 
        
        
        
I hope this helps you 
x^5.y^2.z/x^2.y
x^5-2.y^2-1.z
x^3.y.z
        
                    
             
        
        
        
X+3y=7
x-3y=1
add them together
x+3y=7
<u>x-3y=1 +
</u>2x+0y=8
2x=8
divide 2
x=4
subsitute
x+3y=7
4+3y=7
subtract 4
3y=3
divid 3
y=1
x=4
y=1
answer is A 
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