The variable z varies jointly with x and y. Also, z = -75 when x = 3 and y = -5. What equation describes this variation?

answer options:
x=kyz
y=kxz
z=kxy
k=xyz

start with a line segment pq that we will copy. mark a point r that will be one endpoint of the new line segment. set the compasses' point on the point p of the line segment to be copied. adjust the compasses' width to the point q. the compasses' width is now equal to the length of the line segment pq.

step-by-step explanation:

my answer got deleted but it's a

step-by-step explanation:

a reflection across the x axis and a 90 degree rotation left and right.

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.