David told jen, "write three two-digit numbers. i'll add three more and give you the sum right away." jen wrote 53, 42, and 31. then david wrote 46, 57, and 68 and said the sum was 297. was he right? what pattern did he use?

Ican figure out 20 shares multiply by $117.98 =2359.6920 shares multiply by $124.32=2486.40then take 40 shares multiply by $128.48=5139.20after that i'm lost any be greatly appreciated.

Aswimming pool is a rectangle with semicircles on the end. the rectangle is 12 meters wide and 30 meters long. the diameter and width of the swimming pool are equal. sketch and label an overhead diagram of the swimming pool. find the area of the swimming pool floor.

An object in geometry with no width, length or height is a(n):