I dont understand this at all.

They are the same.

Step-by-step explanation:

The volume of the hemisphere is V = ⅔ π r³.

The cone's height is equal to its radius, so its volume is:

V = ⅓ (π r²) (r)

V = ⅓ π r³

The cylinder's height is equal to its radius, so its volume is:

V = (π r²) (r)

V = π r³

So the total volume on the left side is ⅔ π r³ + ⅓ π r³ = π r³.

The total volume on the right side is π r³.

The volumes are equal, and since all are made of the same material (have the same density), the masses are also equal.

your answer is 23/2 - 13.5

step-by-step explanation:

7/2 evaluates to

multiply x and 4.5

multiply x and 1

the x just gets copied along.

the answer is x

x

4.5*x evaluates to 4.5x

multiply 3 and 4.5x

multiply 1 and x

the x just gets copied along.

x

4.5*x*3 evaluates to 13.5x

7/2-4.5*x*3 evaluates to

  + 8 =

the answer is

7/2-4.5*x*3+8 evaluates to

i wish i could you, i have no idea how to answer this

step-by-step explanation: