PLEASE HELP ASAP!! THANK YOU :D EXPLANATION = BRAINLIEST

Two trains leave the same station. One heads north, and the other heads west. After some time, the train traveling north has gone 20 miles. If the two trains are 101 miles apart, the westbound train has traveled ___ miles

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?

Out of $20$ creepy-crawly creatures in a room, $80\%$ are flies and $20\%$ are spiders. if $s\%$ of the total legs belong to spiders, what is $s$?