Answer:
z + 7
Step-by-step explanation:
<u>Step 1:  Convert words into an expression</u>
The sum of z and 7
<em>z + 7</em>
<em />
Answer:  z + 7
<u>If needed solve:</u>
z + 7 - 7 = 0 - 7
<em>z = -7</em>
 
        
                    
             
        
        
        
Try this option (see the attached picture).
 
        
             
        
        
        
I got you ! 
Step-by-step explanation: 
45 bulbs planted in first year.
65 bulbs the next year.
increase = 20 bulbs 
Number of increase of planted tulip bulb is N = 65 - 45 = 20 
( 20/45)  x 100% = 44.4 % to the nearest tenths