Answer:
The perimeter of the trapezoid is 
Step-by-step explanation:
we know that
The perimeter of the trapezoid is the sum of its four side lengths
so
In this problem

the formula to calculate the distance between two points is equal to
we have

step 1
Find the distance QR

substitute the values in the formula
step 2
Find the distance RS

substitute the values in the formula
step 3
Find the distance ST

substitute the values in the formula
step 4
Find the distance QT

substitute the values in the formula
step 5
Find the perimeter

49pi is area and 14pi is circumference, look up “area of a circle” in google and a calculator will pop up for you, all you do is type in the info and it’ll use the formula to find the answer
Answer:
13 children and 9 adults if the total cost is $152.5
Step-by-step explanation:
Let x children and y adults
x + y = 22 (1)
5.5x + 9y = 125.5 (2)
y = 22 - x
5.5x + 9(22 - x) = 125.5
5.5x + 198 - 9x = 125.5
-3.5x = 125.5 - 198
-3.5x = -72.5
x = 20.7
y = 22 - x = 1.3
Which is not possible
If the total cost is $152.5
x + y = 22 (1)
5.5x + 9y = 152.5 (2)
y = 22 - x
5.5x + 9(22 - x) = 152.5
5.5x + 198 - 9x = 152.5
-3.5x = 152.5 - 198
-3.5x = -45.5
x = 13
y = 22 - 13 = 9
d ( f o c) / dt = 9
( solution is attached below)