Caring+Challenge

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Ka Kin:-) A watermelon and a dragon fruit costs 50 dollars. I buy 2 watermelon and 5 dragon fruit for 175 dollar. How much is a watermelon cost and how much does a dragon fruit cost. Let x be the cost of one watermelon and y be the cost of one dragon fruit??

Jerry Chan There are 50 pigs and chickens head in the fram, and there are 150 pigs feet and chickens feet add together, so how many pigs and how many chickens are there in the fram??

Ricky Liu: John is three times older than George is. The difference between their age is 13. Let x be John's age and y be George's age. Please use the graphical method to solve the age of John and George.

Joycelyn:) Chanel bought 5 shirts and 2 shorts by paying $480. Nicole bought 3 shirts and 6 shorts by paying $570. Find the respective price of a tshirt and a pair of shorts. Let x be the cost of a tshirt and y be the cost of a pair of shorts.

Alice: 10 MacBooks pro and 5 iPhone 4 cost $2794000 .one MacBook pro and a iPhone 4 cost $ 30800.how much does each of them cost?

Ling li: Dave bought 123 biscuits and 321 chocolate chip cookies for $2985. Teletubies bought 456 biscuits and 654 chocolate chip cookies for $7314. How much does a biscuit cost and how much does a chocolate chip cookie cost?

wickson there are 10 Phone and 4 iPad cost 20000 1 phone and 1 ipad cost $ 2750 how much does each of them cost?

Austen: 3 soccer ball and 6 basketball cost $1200. If I buy 18 basketball, it will cost me 1800. What do a soccer ball cost? What do a basketball cost?

Michael: Dave paid $996 for 25 packs of golden cards and 11 packs of silver cards. His mom paid $500 for 25 packs of golden cards and 20 packs of silver cards with a super price. What is the selling price of each kind of card packs per pack and what is the differences between the normal price and the super price?

Brian Jack bought 5 ice creams and 10 cokes, and it cost $125 bucks, Josh bought 4 ice creams and 7 cokes and it cost $122 how much does one ice cream and one coke cost.

Gordon Chan : Mr. Jacob bought 4 GTA and 1 Call of Duty: Black ops for $500 and Roman bought 3 GTA and 2 Call of Duty: Black ops for $425, find their prices respectively and let X=GTA4 and Y=Call of Duty: Black ops

Chantelle: Kelly bought 4pizzas and 3 chicken wing sets. The total cost her $365. Thomas bought 2pizzas and 5 chicken wing sets. The total was $347. How much is one pizza and one chicken wing set respectively?

Megan: Wien and Blanche are planning to plant some flowers in their gardens. Wien bought 35 sunflower seeds an 20 Jasmine seeds, it totally cost her $215. Meanwhile, Blanche bought 30 sunflower seeds and 40 Jasmine seeds. It cost her $230. What are the respective prices of a sunflower seed and Jasmine seed?

Sandy: I pay $1000 for 2 different kinds of CDs. If I buy 5CDs of 2NE1’s and 3CDs o Show Luo’s, and I will need $900 more. If I buy 3CDs of 2NE1’s and 5CDs of Show Luo’s and I will have $900 left. Find the selling price of each kind of CDs.

Anthony:2 oranges and 5 apples cost 30dollars. Mom pays 39.5 for 3 oranges and 2 apples. Find each apple and orange cost.

Calvin Chan: Calvin bought five apples and ten pineapples, a total of $370. Micheal bought four apples and sold ten pineapples, the trader gave $109 to micheal. So what is the price of an apple and a pineapple?

Christopher Lai A adult ticket cost $285 and a children ticket cost $230. A group of people paid $2520 for tickets. How many adult and children ticket are sold?

Douglas Chan: I have 5 pens and 10 pencils, my mom gets 20 pencils and 25pens. The cost of our pens are $50 and the cost of our pencils are $35. Find how much does the pens and pencils cost?

Karen Ng Ka Yuet During the first day of flag selling, Sally has sold x flags, Jack has sold y flags. The sum of them is 20 flags. Then nest day, Sally sold 3more x flags and Jack sold more 2y of flags. The sum is 50 flags more than the first day. Lets find x and y. If can, try to use matrices.