Z varies directly with X squared and inversely with Y. When X equals two and Y equals four, Z equals three. What is the value of Z when X equals four and Y equals nine A: 2/3

B: 16/3

C: 8/3

D: 24

B

Step-by-step explanation:

Set up the equation

z =

Plug in the numbers to find the value of k

3 =

12 = 4k

3 = k

Solve to find the value of z

z =

z =

z = 48/9

z = 16/3

a

step-by-step explanation:

when a number is between two straight lines it means the absolute value.

to find absolute value you need to know how many numbers is that number away from 0.

when finding absolute value the number will always come out positive

so absolute value of -3 is 3

absolute value of 3/2 is 3/2

absolute value of -2 is 2

absolute value of 3.5 is 3.5

absolute value of -1 is 1

now put these numbers in order:

a)   |-1|, |3/2|, |-2|, |-3|, |3.5|

step-by-step explanation:

mean or average is 40.6