Sammy and Luis each threw a ball into the air at the same time. The height, in feet, of Sammy's ball after t seconds is modeled by the expression 2+ 40t - 16t2. The height of Luis's ball after t seconds is modeled by

2 + 35t - 16t2. Which expression can be evaluated to find how much higher Sammy's ball is than Luis's ball after t seconds?

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

it's undefined because anything multiplied by 0 is 0. that said, 7 days is 168 hours

it would be 4 over -2 divided by -1 over 3.

if you want a solution it would be 4

you flip it so it would be 4/-2 divided by 3/-1 then it would be 12/3 and you would simplify it to 4