I'm so stuck I was taught this 5 months ago I don't remember this lol.

What are the values of each variable in the diagram below?

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585

Amotorboat maintained a constant speed of 12 miles per hour relative to the water in going 45 miles upstream and then returning. the total time for the trip was 8.0 hours. use this information to find the speed of the current.