Three ways to solve systems of equations ?

How can we find the measure of an exterior angle if we know the measurement of an interior angle

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

If a line is defined by the equation y = 5x + 2, what is the slope?