Asolid has faces that consist of 4 triangles, 3 rectangles, and 1 hexagon. the solid has 9 vertices. how many edges does the solid have? . a.. 12 edges. b.. 15 edges. c.. 18 edges. d.. 21 edges.

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