How many different 4- letter license play

4! = 24

Step-by-step explanation:

You can choose one of the four letters to be the first one. That's four different possibilities. Next, for the second letter, you have 3 letters to choose from, that gives you 3 possibilities for each of the four previous possibilities. That's 12 possibilities total. For the third letter, you can choose from 2 remaining letters, giving you 2 possibilities for each of the 12 earlier possibilities. That's a total of 24 possibilities. Finally, you have only one choice (no choice) for the last letter. That leaves you at 24.

b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .

he answer is x=1x3 because x=1 to x=3