Max is building a garage and a shed in his yard and wants to be sure the triangular roofs are similar. The garage triangular roof has sides of 12 feet, 18 feet and 30 feet. The shed triangular roof has sides of 6 feet, 4 feet and 10 feet. Are these roofs similar?

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

Water flows at a steady rate from a tap. its takes 40 seconds to fill a 4 litre watering can from the tap. the rate at which water flows from the tap is halved. complete: 4 litres into cm3

What is the value of x when x + 7 = 21?