Answer:
A.
Step-by-step explanation:
I took the K12 test and the answer is A.
The image below shows y = 5/3x - 9 being graphed.
Hope this helps! :)
Step-by-step explanation:
x y is the the side of the perimeter if u know what I mean
To solve this problem we can use system of equations.
First equation can be
321=x+y
where x - ppl between 4-17 and y - adult
second equation can be as follows
1590=6*y+4*x
So we have

From first equation we get value of x in times of y
x=321-y
Now we can substitute it into second eq.
1590=6y+4(321-y)
now simply if
1590=6y+1284-4y /-1284 both sides
306=2y /:2 divide both sides by 2
y=153
Now we can back substitude
x=321-153
x=168
So we get result
3.25s - 35.5 = 663.25
---Add 35.5 to each side
3.25s = 698.75
---Divide both sides by 3.25
s = 215
Hope this helps!! :)