Find (fog)(x) for f(x)=x^2+4 and g(x)=7-x
please answer asap urgent!

The dolphins at the webster are fed 1/2 of a bucket of fish each day the sea otters are fed 1/2 as much fish as the dolphins how many buckets of fish are the sea fed each day? simplify you answer and write it as a proper fraction or as a whole or mixed number

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

The function models the number of accidents