I'm not 100% sure, but I believe the answer would be: 
D. For every additional adult at the park, the number of children increases by about 7. 
P.S. good luck on the 6.10, fellow classmate!
        
                    
             
        
        
        
Because it is a question asking for ppl playing either soccer OR basketball, we add the two fractions together. Thus, Part A becomes 3/10 + 4/10, which is 7/10 (since the denominators are the same, you only add the numerators).
        
             
        
        
        
Answer:
456
Step-by-step explanation:
Number of chairs around the round tables = 6×7=42
Number of chairs around the rectangular tables =23×18=414
The total number of chairs in the cafeteria = 6×7+23×18=456
 
        
             
        
        
        
(x+4)^2 / 9 - (y+3)^2 / 16 = 1
a^2 = 16 and b^2 = 9
a = +4 and -4
b = +3 and -3
Center is (-4, -3)
Vertices is (-4 + a, -3) and (-4 - a, -3)
Vertices is (-1, -3) and (-7, -3)
 
        
             
        
        
        
Answer:
2.4
Step-by-step explanation: