Which equation would you use to solve the following situation?

molly buys some concert tickets at $10 each. if she spends $90 on the tickets, how many did she buy?

90 -t = 10
10t = 90
10 + 90 = t
9t = 90

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 you determine whether a relationship represented as as graph is linear or nonlinear

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64