Write a story about temperatures that this expression could represent 5 + (-20)

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

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

Two corresponding sides of two similar triangles are 3cm and 5cm. the area of the first triangle is 12cm^2. what is the area of the second triangle?