If (a, b) is the vertex of f (2)
= -5x2 – 20x + 10, then what is the value of b?

The long jump record, in feet, at a particular school can be modeled by f(x) = 19.6 + 2.5ln(x + 1) where x is the number of years since records began to be kept at the school. what is the record for the long jump 11 years after record started being kept? round your answer to the nearest tenth.

Solve for x i'll try to attach the files bc it's not letting me for some reason

In the coordinate plan (-6,9) b (3,9) c (3,3) def is shown in the coordinate plan below