Answer:
3(x-6)
Step-by-step explanation:

First, find the scale factor by dividing the first building's real-life height by its model height.

Now, we'll write an equation to find the model height of the second building.

Here is an equation where
represents the real-life height of a building,
represents the scale factor, and
represents the model height of the same building.
Fill in the information we already know.

Divide both sides by
.


So, the model height of the second building is
inches.
Answer: =3x+3
Step-by-step explanation:






Let the number of children be c, and the number of adults be a.
c + a = 170 (total number of tickets)
Then the cost of each is: $5.90/child, $9.60/adult:
5.9c + 9.6a = 1269.40 (total sales)
Solving as 2 simultaneous equations, we first transform the first equation:
a = 170 - c
Substitute into the 2nd equation:
5.9c + 9.6(170 - c) = 1269.40
Solving gives c = 98, and a = 170 - 98 = 72. This means that 72 adult tickets were sold that day.