#### Answer

a) The Nimitz Class carrier is 1092 ft long and the Enterprise Class carrier is 1101 ft long
b) The Enterprise Class carrier is 3.67 football fields long

#### Work Step by Step

a) N = length of the Nimitz Class carrier, E = length of Enterprise Class carrier;
We are given that: E + N = 2193ft and E - N = 9ft
Solve for E in the second equation: E = N + 9
Plug E into the first Equation: E + E + 9 = 2193
Solve for E: 2E + 9 = 2193
2E = 2184
E = 1101ft
Plug this value of E back into second Equation
This gives the value of N = 1092ft
b) As a football field is 100 YARDS long it is easiest to first convert the length of the enterprise to yards from feet.
1101ft / 3 = 367yds
a football field is 100yds so divide the length of the enterprise by the length of a football field to found how many football fields.
367 / 100 = 3.67 football fields.