Adoor lock requires 3 different letters to be pressed in the correct order. if each permutation can only be made from the letters abc, how many different permutations can there be?

 6 different permutations .

Step-by-step explanation:

The permutation of n things taken r at a time is given by:-

Given : A door lock requires 3 different letters to be pressed in the correct order.

If each permutation can only be made from the letters ABC, then the number of different permutations can there be is given by :-

Hence, there can be 6 different permutations .

choice b is correct

step-by-step explanation:

we have been given the following system of inequalities;

we are required to graph the solution to the system of inequalities. using a graphing tool, the graph of the system is as shown in the attachment. the continuous line represents the graph of while the dotted line represents .

ok

step-by-step explanation: