Simplify the expression by combining like terms; 4z+4-z+5

3z+9

Step-by-step explanation:

=4z+4-z+5

=4z-z+4+5

=3z+9

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

answer: i don't understand. what are the options

step-by-step explanation: