Pls help me. if you answer please give step-by-step answers

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

Find cot x if sin x cot x csc x = √2