Approximately 7.2 units <span />
        
             
        
        
        
W = 120 + 5(h - 30). 
 
So, if he works 35 hours, he will earn:
 
120 + 5(35 - 30) = 120 + 5(5) = 120 + 25 = $145.
 
If he works 42 hours, he will earn:
 
120 + 5(42 - 30) = 120 + 5(12) = 120 + 60 = $180.
        
             
        
        
        
Answer:
Mr.Lin's present age is 30 years now. His son is 8 years old now.
Step-by-step explanation:
Let L = Mr.Lin's present age,
    S = his son's present age.
First equation  is
L + S = 38.       (1)
The second equation is  
L + 3 = 3*(S+3)   (2)   ("In three years' time, Mr.Lin will be three times as old as his son.")
From (1), express S = 38-L and substitute it into (2). You  will get
L + 3 = 3*((38-L)+3),   or
L + 3 = 114 - 3L + 9,
4L = 114 + 9 - 3,  
4L = 120,
L = 30.
 
        
             
        
        
        
Answer:
A. 2,310 sq ft
Step-by-step explanation:
<u>R</u><u>e</u><u>c</u><u>t</u><u>e</u><u>n</u><u>g</u><u>l</u><u>e</u><u> </u><u>b</u><u>e</u><u>l</u><u>o</u><u>w</u><u>:</u>
- A = l × b
- A = 74 × 15
- A = 1,110ft
<u>Rectangle Above</u><u>:</u>
- A = l × b
- A = 50 × 24
- A = 1,200ft
<u>A</u><u>r</u><u>e</u><u>a</u><u> </u><u>o</u><u>f</u><u> </u><u>t</u><u>h</u><u>e</u><u> </u><u>P</u><u>l</u><u>a</u><u>y</u><u>g</u><u>r</u><u>o</u><u>u</u><u>n</u><u>d</u><u>:</u>
- 1,110ft + 1,200ft
- 1,310 sq ft (A)