ANSWER
The number of children between the ages of 9 and 15 who visited the park is

EXPLANATION
The number of children between the ages of 9 and 15 who visited the park are those within the age group 9 to 12 and 12 to 15.
We can from the graph that, the height of the bar that corresponds to the age group 9 to 12

and the height of the bar that corresponds to the age group 12 to 15

The sum of the two frequencies
The answer is (2,-9). Hope i can help.
Answer:
A cuz x+6 is double x-3 so divide them and equate it to 2 you'd get x+6 = 2x-6
12=2x-x
- Perpendicular=P=4
- Base=B=4
Hypotenuse be H
Apply Pythagorean theorem





Answer:
If you're talking about things like Algebra and Geometry, its Geometry
If you're not, can you be more specific ? :D