What is the answer I attached the question

2-digit numbers less than 91 which are 1 less than a multiple of 10

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

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