Matt runs a 100-meter race. 5 seconds after the race started matt is 35 meters from the starting line and reaches his max speed; he runs at this max speed for the rest of the race. matt notices that he is 67 meters from the starting line 9 seconds after the race started. a. what is david’s max speed. b. suppose david runs for an additional 3 seconds after reaching his max speed. how far i’ll david travel during those additional 3 seconds? (meters) what is david’s distance from the starting line 10 seconds after the race started?
c. what is david’s distance 8.5 seconds after the race started?

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1

i have no idea just need points sorry

step-by-step explanation:

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.