Name the sampling method that will best represent the whole population in each situation. Explain your answer.
3. Student satisfaction with the middle school cafeteria.
Method A: Survey 40 students in two seventh-grade math classes.
72 percent are satisfied with the food in the cafeteria.
Method B: Survey 65 students from a list of all students in the school.
85 percent are satisfied with the food in the cafeteria.
Method best represents the whole population of the school.

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

because they could drop even lower..

y=3x+4

step-by-step explanation:

given the points a(0,4) and b(-4, -8)

eqn of line ab: (y-4)/(x-0)=(-8-4)/(-4-0)

(y-4)/x=-12/-4=3

y=3x+4