Aclass of 18 students is going to elect a class president, a class vice president, a class secretary, and a class treasurer. how many different ways can these positions be selected from the class?

73440 ways

Step-by-step explanation:

Given: The total number of students = 18

Since they are going to elect a class president, a class Vice President, a class secretary, and a class treasurer.

Thus, they are going to elect 4 different positions from class.

By permutation, the number of ways  in which these positions can be selected

Hence, there are 73440 ways to select given positions.

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

source:

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right