QUICK math problem- basic algebra

Test Preparation
1

<p>I need to solve for t. I keep getting ~3.90. Is this what you got?</p>

<p>Problem:</p>

<p>400=.5(a)t^2
360=.5(a)(t-.2)^2</p>

<p>Help!! Thanks</p>

2

<p>Yeah it is. lol.</p>

3

<p>One way to check: assume a value for 'a' (say a=10), plug in a=10 and t=3.90, and see if both equations are correct. If you <em>really</em> want to be safe, try with a second value of a as well.</p>