F(x) = 9x^2 + 66x + 21

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?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab