Find the sum of 5x + 20 and the opposite of 20 . Write an equivalent expression in standard form. Justify each step.

Hi my sisters and brothers can tell me the answer because i don’t understand the question

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

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show