Resuelve
1 . 4x= 20
2.x/7=2
3. 3x=2
4. x/2=7

Three coins are flipped. what is the probability that there will be at least two tails?

Asquare has a perimeter of sixteen centimeters. what is the length of each of its sides? a. 8 cm c. 9 cm b. 4 cm d. 10 cm select the best answer from the choices

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