The value of y varies jointly with the values of x and z When x = 4 and z = 10, the value of y is 360. What is the value of y when x 5 and z = 12?
A. 540
B. 9
C. 153
D. 450

A

Step-by-step explanation:

Joint variation is given by:

Where k is some constant.

We are given that y = 360 when x = 4 and z = 10. Therefore:

Solving for k:

Therefore, our equation is:

Then when x = 5 and z = 12:

The answer is A.

given : the shape of his satellite can be modeled by   where x and y are modeled in inches.

now,the given equation   is a equation of parabola.

here, coefficient of x is positive, hence the parabola opens rightwards.

on comparing this equation with standard equation , we get

in standard equation, coordinates of focus=(0,m)

thus for given equation coordinates of focus=(0,1.5)

step-by-step explanation:

add 8+12 to get a simplified answer of 12r-20