Answer:
10
Step-by-step explanation:
Let c = sum of ages of all children.
mean age of all children = c/15 = 7
c = 15 * 7 = 105
The sum of the ages of all children is 105.
Let b = sum of ages of the 9 boys.
mean age of boys = b/9 = 5
b = 9 * 5 = 45
The sum of the ages of the boys is 45.
The sum of the ages of the girls is c - b.
c - b = 105 - 45 = 60
The number of girls is 15 - 9 = 6
mean age of girls = (sum of ages of the girls)/(number of girls) =
= 60/6 = 10
Answer:
18
Step-by-step explanation:
David=x
Michelle=x-2
Karen=x-2+6=x+4
sum of ages=62
x+x-2+x+4=62
3x=60
x=20
age of Michelle=20-2=18
Answer:
?* 2. B х. N001 6. O A. (x - 2) ^2 + (y - 1)^2 = 9. O B. (x + 2)^2 + (y + 1)^2 = 9
i hope this answer correct
3x(x^2+4)
3x(x^2)+3x(4)
=3x^3+12x
Answer:
you only have one graph
Step-by-step explanation:
