Difference between commutative and symmetrical property; as they both share the feature 'a+b = b+a'

They both use the communitive property

:)

Step-by-step explanation:

x+y=90

x=30-y=x

step-by-step explanation:

if you understand you will get the answer

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere