Identify all the two-dimensional figures that are cross-sections for each of the three-dimensional solids. Cube

hexagon
triangle
octogon
square
pentagon
rectangle
trapezoid

i. hexagon

ii. triangle

iii. octagon

iv. square

v. pentagon

vi. rectangle

Step-by-step explanation:

A two-dimensional figure is a flat figure that is described by its length of sides only. It can be obtained from a three dimensional solid when sliced or truncated.

Truncation is the process of cutting a solid with respect to a given plain. Therefore, when a three dimensional solid is truncated, the face forms a two dimensional figure. An example is when a cube is truncated horizontally, a square can be obtained at the surface.

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40