Can y’all help me with the 3 questions still don’t wanna do it

Kevin and randy muise have a jar containing 78 coins, all of which are either quarters or nickels. the total value of the coins in the jar is $13.90. how many of each type of coin do they have?

Which fraction below is equivalent to 10/12?

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