Two students were given the expression shown to simplify.

use the drop-down menus to complete the statements about whether each student's answer is an equivalent expression. then choose an expression that is equivalent.

math item stem image
clear check
sergio: 9−(−3x)
sergio's expression is because .

leon: 9+3+6x
leon's expression is because .

equivalent expression

a correct equivalent expression is .

a net is a diagram that shows a “flattened” view of a solid. in a net, each face and base is shown with all of its dimensions. a net can also serve as a pattern to build a three-dimensional solid.

a pyramid is a three-dimensional object with a base that is a polygon and triangular faces that meet at one vertex.

" the net of a triangular pyramid consists of four triangles. the base here we are given of the pyramid is a equilateral   triangle, and the lateral faces are also triangles "

go on the tube you might find some information there