# Math Help - 15=-0.025(d-30)^2+24

1. ## 15=-0.025(d-30)^2+24

15=-0.025(d-30)^2+24

how would you find d?

very urgent thanks =)

2. Originally Posted by dahao
15=-0.025(d-30)^2+24

how would you find d?
Can you solve 18 = 3x^2 - 7 for x?

If so, then follow the same process for your equation. If not, please show how far you can get, so we know where to start helping.

Thank you!

3. ah so you convert the equation into a standard form then solve for x?

4. Originally Posted by dahao
ah so you convert the equation into a standard form then solve for x?
I don't know what you mean by "standard form". I was referring to the steps involved in the solving process. Are you able to solve the equation provided?

If so, then use the exact same steps in the exact same order (though with the different numbers, of course) to solve the equation you'd posted.