1. Five people arrive simultaneously at a theater. In how many ways can they line up at the ticket booth?

120

Step-by-step explanation:

Using factorial, we can calculate the total possible number of combinations to line up.

5! = 120.

5! is another way of saying 5 × 4 × 3 × 2 × 1

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x

7.25

step-by-step explanation:

we know that 7 equals to 7.0. we also know that 1/4=0.25. so we can add the two together and we get 7.25