A certain field is a rectangle with a perimeter of 870 feet. The length is 191 feet more than the width. Find the width and length of the rectangular field

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?

Asap 25 pts + brainlest to right/best answer

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8