The variable z is directly proportional to x, and inversely proportional to y. when x is 7 and y is 7, z has the value 2. what is the value of z when x= 10, and y= 12

z =

Step-by-step explanation:

Given z is directly proportional to x and inversely proportional to y then the equation relating them is

z = ← k is the constant of proportionality

To find k use the condition x = 7, y = 7 and z = 2

k = = = 2

z = ← equation of proportionality

When x = 10 and y = 12, then

z = = =

incomplete question. how do you expect anyone to you when you do not post the question in its entirety?

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.