Ming throws a stone off a bridge into a river below. the stone's height (in meters above the water), xxx seconds after ming threw it, is modeled by: h(x)=-5(x-1)^2+45h(x)=? 5(x? 1) 2 +45h, left parenthesis, x, right parenthesis, equals, minus, 5, left parenthesis, x, minus, 1, right parenthesis, start superscript, 2, end superscript, plus, 45 what is the maximum height that the stone will reach?

sorry, i can't understand your question. will later if you describe more clearly!

: )

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m