

1. 
Evaluate 3x + 2y if x = 3 and y = 7. 


A. 
105 
B. 
23 


C. 
5 
D. 
27 


Hint 


2. 
Evaluate if a = 9, b = 6 and c = 3. 


A. 
5 
B. 
11 


C. 
9 
D. 
15 


Hint 


3. 
Evaluate x + 5y if x = 12 and y = 9. 


A. 
57 
B. 
47 


C. 
153 
D. 
71 


Hint 


4. 
In physics, the number measures the force of gravity between two objects when a and b each stand for the mass one of the objects and d stands for the distance between them. Find the force of gravity when a = 5, b = 8, and d = 2. 


A. 
10 
B. 
40 


C. 
20 
D. 
5 


Hint 


5. 
Evaluate x^{2} + 2xy + y^{2} if = 4 and y = 7. 


A. 
65 
B. 
121 


C. 
86 
D. 
78 


Hint 


