Afamily 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?

1. what are the missing reasons in the proof 2. it's in the second picture and 3

The cross-sectional areas of a right triangular prism and a right cylinder are congruent. the right triangular prism has a height of 6 units, and the right cylinder has a height of 6 units. which conclusion can be made from the given information? the volume of the triangular prism is half the volume of the cylinder. the volume of the triangular prism is twice the volume of the cylinder. the volume of the triangular prism is equal to the volume of the cylinder. the volume of the triangular prism is not equal to the volume of the cylinder.

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.