急~~~~15點！小六數學功課! (有些是英文)

只要答案!! 唔該!!!
Q1- The average of a group of 10 numbers is 35. If 46 is added into the group, what is the average of this group of numbers now?
Q2- There were 20L of water in a tank, after 5 hours later, only 5L of water was left, what was the average percentage of water leaking from the tank in one hour?
Q3- The fare of a MTR ticket increases from $20 to $21. What is the percentage increase?
Q4- The perimeter of a rectangle is 36 cm, its width is 80% of its length. What's the width of the rectangle?
Q5- The weight of a dog is 11 kg, which is 10% more than a cat. What is the weight of the cat??
Q6- 68% + 3/4 -0.95
Q7- y/8 +y/9 = 17
Q8- 6 又 1/8% 到小數
Q9- The average of a group of 12 numbers is 45, 6 is added into the group and so what's the average of the group?
Q10- There was 2400 cm3 of sand in a tank, after 4 hours later, 300 cm3 (cm cube) of sand was left in the tank, what's the average percentage of sand leaking in each hour?
Q11 -A man spent 84% of his monthly income, what's his monthly income if he saved $14400 a month?