Can I get help with this?

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 20 = x a. 5, 4 b. -5, -4 c. -5, 4 d. 5, -4

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be