Marco needs to make a five letter password, without repeating any letters. How many different passwords could Marco make?

7893600

Step-by-step explanation:

There are 26 letters

first space has 26 choices

second space has 25 choices because one choice would make it repeating

third has 24 choices

fourth has 23 choices

fifth has 22 choices

multiply them together to get the answer

26*25*24*23*22 is 7893600

what are the things "represented below"?

step-by-step explanation:

nobody can if you dont give the choices

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18