Answer:
x + 10 = x² + 1
(third option listed)
Step-by-step explanation:
assuming that you meant: 
, because otherwise there would be no equivalent relationships,
(goal: isolate x on one side of the equation whilst having x on the other side of the equation also, like the equation in the question)*
x + 10 = x² + 1
-1 -1
x + 10 - 1 = x²
[find √ of both sides to isolate x]
(equation in problem)
{note: there's no reason to not simplify the equation to 
, but the question leaves the equation that way, so I didn't simplify it either}
*I used this goal to decide which equations seemed about right, and then trying to test things out in my head
Answer:
I think 3 17/21
Step-by-step explanation:
First we have to see in both cases what is the cost of one ticket
in the fist case 12.5/5=2.5
in the second case 20.16/8=2.52
therefore 5 tickets for 12.5 is the better deal
Applying pythagorean theorem:-
39. FALSE
40. Where is the answer?
