Permutations, Exercises
1. a) Evaluate
9! =
b) In how many ways can 6 people line up at a ticket window?
2. a) Compute:
7P3 =
b) In how many ways can the letters of the set {M, N,O, P,Q} be arranged to
ordered codes of 4 leters?

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

you bought 31 v bucks

step-by-step explanation:

25+6=31