Write the sum of 7√28x⁶+4√7x⁶ in simplest form, if x≠0

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

7+(3n++8) what is the answer to this?

Brittany has designed four different birdcages, each with the same volume: a square pyramid, a cylinder, a cone, and a sphere. the zoo wants to use one of brittany’s designs but plans to change the volume of the cage. find the design change that would result in the birdcage with the greatest volume. a.) increase the area of the base of the square pyramid by a factor of ten. b.) increase the height of the cylinder by a factor of ten. c.) increase the radius of the cone by a factor of ten. d.) increase the radius of a sphere by a factor of ten.