Problema Solution
The Rocket Coaster has 15 cars, some that hold 4 people and some that hold 6 people.There is room for 72 people altogether. How many 4-passenger cars are there? How many 6-passenger cars are there?
Answer provided by our tutors
let
a = the number of 4-passengers cars
b = the number of 6-passengers cars
The Rocket Coaster has 15 cars
a + b = 15
There is room for 72 people altogether
4a + 6b = 72
by solving the system of equations
a + b = 15
4a + 6b = 72
we find
a = 9 4-passengers cars
b = 6 6-passengers cars
click here to see the step by step solution of the system of equations
there are nine 4-passengers cars.
there are six 6-passengers cars.