Barack walks 2 kilometers south and then x kilometers east. He ends 5 kilometers away from his starting position. Find x rounded to the nearest tenth of a kilometer.

What is the ratio for the surface areas of rectangle prisims shown below given that they are similar and that the ratio of their edge lengths is 7: 3

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?