WILL GIVE BRAINLIEST

can someone tell me a few linear equations with one solution?

What basic trigonometric identity would you use to verify that csc x sec x cot x = csc^(2)x

What is the area of the triangle 10 13 12

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