Which triangles are similar to \triangle ABC△ABCtriangle, A, B, C?

You are on a cycling trip around europe with friends. you check the weather forecast for the first week. these are the temperatures for the week. sun mon tues wed thurs fri sat 16°c 20°c 24°c 28°c 28°c 23°c 15°c what is the mean temperature forecast for the week?

Can someone me out here and the tell me the greatest common factor

Kayaks rent for $35 per day. which expression can you use to find the cost in dollars of renting 3 kayaks for a day?