**Step-by-step explanation:**

y-15=x^2+10x

y-15+25=x^2+10x+25

y+10=(x+5)^2

it hasn't been specified which ticket the question's is asking but I'm guessing the price of the adult ones so $30.00

altogether that's two adults and 3 children who all paid a total of $105.00

let's simplify that to algebra

children tickets = c adults tickets = a

3c + 2a = $105.00

we know that 1c is 0.5a because each child ticket is half of an adults one <em>as stated in the question</em>

so in terms of (adults) a: half of 3 meaning 3×0.5= $1.5 meaning 1.5a

so now <em>3c = 1.5a</em>

so we can substitute and have like terms

meaning 1.5a + 2a= $105

3.5a =$105.00

divide by 3.5 on both sides to get a by itself thus the value of a:

a = $30

so each adult tickets cost $30

Answer: (x+10 / x+3)

Explanation: you can find the perimeter by adding up all the sides so you get (x^2 - 21 / x^2 - 9) + (5/ x+3) + (2 / x-3), factor the expression, simply and reduce.

Hope this helped! :)

**Answer:**

2

**Step-by-step explanation:**