Answer:
D. 31
Step-by-step explanation:
First, you have to order the set of numbers.
22, 25, 28, 31, 34, 37, 40
Then, you add the lowest number (22) with the greatest number (40).
22 + 40 = 62
Finally, you divide the sum (62) by 2.
62/2 = 31
2x^2 + 9x + 4 = 0
x^2 + 9/2*x + 2 = 0
x = - 9/4 +- √(81/16 - 32/16) = - 9/4 +- 7/4
x1 = - 1/2
x2 = - 4
8Girls
52/4=13
13*3=39
39+5=44
52-44=8 girls