The ratio of girls to boys would be  16:12 because if you divide 28 by 2 you get 14. subtract 2 to on one of them and add the two to the other. You get 12 and 16. There is a difference of 4 to them and when you add them together you get 28. :)
        
             
        
        
        
We are given with:
Average height of plants to be at least 73 inches
Three plants with heights of
70, 71, 72
The inequality that can be used to determine the possible heights of the fourth plant is:
(70 + 71 + 72 + x) / 4 ≥ 73
Solving for x
x ≥ 79
        
             
        
        
        
Answer:
x≥7
Step-by-step explanation:
6(x-3)/8≥3
Multiply each side by 8/6
8/6*6(x-3)/8≥3*8/6
(x-3)≥4
Add 3 to each side
x-3+3≥4+3
x≥7
 
        
             
        
        
        
Given that:
f(x) = -2x²-2x+10
f(2) = -2(2)²-2(2)+10
 = -2(2*2) - 4 + 10
 = -2(4) - 4 + 10
 = -8 - 4 + 10
 = -12 + 10
 = -2 Ans.
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