Find the value of y for a given value of x, if y varies directly with x

Step-by-step explanation:

When "y varies directly with x" this means that:

where k is a number we need to find out (called the constant of proportionality if you care about that).

We can figure out what k is because they tell us when y= -252, x=84. Substituting those values into our equation we get:

and therefore:

.

So our equation or formula between y and x is:

.

So when x = 74, then:

then, the surface area of the sphere shown in the image is: 256π sq. units!

step-by-step explanation:

the lateral surface area of a sphere is 2πrh where h=2r.

then:

surface area = 4πr^2.

in this case, r=8 units ⇒ surface area = 4π(8 units)^2. = 256π sq. units!

then, the surface area of the sphere shown in the image is: 256π sq. units!

answer: 0+0=0

step-by-step explanation:

that is the only answer that can make 0