Answer:
A=42
Step-by-step explanation:
A=(6)(7)=42
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
Answer:
(2x + 11)(2x - 11)
Step-by-step explanation:
4x² - 121
rewrite the expression in the form of (a)² - (b)²:
(2x)² - (11)²
difference of squares a²-b²=(a+b)(a-b):
(2x + 11)(2x - 11)