Lina has nickels and dimes in her purse. The ratio of nickels to dimes is 3 to 4. She has a total of 35 coins. How many of the coins are dimes?

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

Can someone me with the property questions for 12 13 and 14 plz

Timmy uses 1 1 2 cups of sugar for every 2 gallons of lemonade he makes. how many cups of sugar would timmy use if he makes 13 gallons of lemonade?