Answer: lisa earns 6 dollars per hour 
Step-by-step explanation:
45 divided by 7.5 =6
 
        
                    
             
        
        
        
Me being a junior in high school and not knowing middle school math
        
                    
             
        
        
        
Answer:
3
x
x
+
y
Step-by-step explanation:
(think about it with a horizontal line between the two numbers)
When using fractions and whole numbers turn the whole numbers into fractions like ---> 3/1 
and if their like 3 5/6 (for example) you would multiply the denominator by the whole number ---> 3*6=18 then add what's on the numerator with it. so 18+5=23 which would make it 23/6 
Just some tips for making it easier! 
Hope it helps! :)