lisafreeguard lisafreeguard
  • 27-05-2015
  • Mathematics
Answered

A family purchased tickets for a concert. They paid a total of $90 for 7 adult tickets and 12 child tickets. The price of a child ticket was two-thirds the price of an an adult ticket. How much was the price of an adult ticket?

Answer :

lovelybird lovelybird
  • 27-05-2015
a is aldult tickets
b is child tickets

b = 2/3 a

7a + 12b = 90
7a + 12 x 2/3 a = 90
7a + 8a = 90
15a = 90
a = 6; b = 4
Answer Link

Other Questions

A 33 kg gun is standing on a frictionless surface The gun fires a 577g bullet with a muzzle velocity of 325ms The positive direction is that of the bullet Calcu
The length of a rectangle is twice its width The perimeter of the rectangle is 126 feet
A machine has a mechanical advantage of 5 if 300 newtons of input force is used to produce 3000 newton meters of work what is the output force and what is the d
what is a unit form of 2 tens 1 one 10
What is a rational number between 16 and 112
In how many ways can a committee of 6 be chosen from 5 teachers and 4 students if the committee must include 3 teachers and 3 students
which element has an atom in the ground state with a total of three valence electrons
The two products that held religious and social importance among the Aztecs and also developed special significance to Europeans on the other side of the Atlant
Solve the system of equations x 4y 5 x 3y 2
WHAT IS NINE TENTHS OF NINETY POUNDS