3.Mary is 2y years old now. Fire years ago, her age was half of her father's age. Express the present age of her father in terms of y(in expanded form).
4.If each side of a squre is decreased by 12cm, the new perimeter will be 124cm.Find the original length of each side and the original perimeter of the square.
5.Sam pays $145 for 2 T-shirts and 4 pairs of socks. If the price of each pair of sock is1/5 of each T-shirt, find the price of a T-shirt.
6. Some sweet are shared by a group of children. If each child gets 5 sweets, 8 sweets will be left. If each child wants to get 7 sweets, 10 more sweets will be needed. How many sweets are there?作者:
●siu_y_an§ 時間: 2007-8-21 04:11 PM