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math QUICK!!!! 20點
發問:
1. The price of a mouse pad is $55 less than that of an optical mouse.If the total price of 3 mouse pads and 1 optical mouse is $255.What is the price of an optical mouse?(Show your working)2. The number of seats in a cinema's Hall A is 5/6 of that of Hall B.Id these two halls have 220 seats... 顯示更多 1. The price of a mouse pad is $55 less than that of an optical mouse.If the total price of 3 mouse pads and 1 optical mouse is $255.What is the price of an optical mouse?(Show your working) 2. The number of seats in a cinema's Hall A is 5/6 of that of Hall B.Id these two halls have 220 seats altogether,find the number of seats in Hall A and the nuber of seats in Hall B.(Show your working) 3.The price of a model car is $300.John wants to buy the model car and he only has $45 savings.After receiving $x from his mother,John has money more than the price of the model car.Write an inequality to represent this situation.Find the sum of money received from his mother if John just has enough money to buy the model car.(Show your working)
最佳解答:
其他解答:
1. Let the price of an optical mouse be $x 3(x-55)+x=255 3x-165+x=255 4x-165=255 4x=420 x=105 The price of an optical mouse is $105 2.Let the number of seats in Hall A be 5/6x and the number of seats in Hall B be x 5/6x+x=220 11/6(x)=220 x=120 The number of seats in Hall A is 5/6x, x=120, then the number of seats in Hall A is 5/6 times 120=100 , the number of seats in Hall B is 120. 3. The sum of money received from his mother is: 45+x=300 45+x-45=300-45 x=255 The sum of money received from his mother is $255. Hope I can help you with these questions. >,<8081B933AEEFE995
math QUICK!!!! 20點
發問:
1. The price of a mouse pad is $55 less than that of an optical mouse.If the total price of 3 mouse pads and 1 optical mouse is $255.What is the price of an optical mouse?(Show your working)2. The number of seats in a cinema's Hall A is 5/6 of that of Hall B.Id these two halls have 220 seats... 顯示更多 1. The price of a mouse pad is $55 less than that of an optical mouse.If the total price of 3 mouse pads and 1 optical mouse is $255.What is the price of an optical mouse?(Show your working) 2. The number of seats in a cinema's Hall A is 5/6 of that of Hall B.Id these two halls have 220 seats altogether,find the number of seats in Hall A and the nuber of seats in Hall B.(Show your working) 3.The price of a model car is $300.John wants to buy the model car and he only has $45 savings.After receiving $x from his mother,John has money more than the price of the model car.Write an inequality to represent this situation.Find the sum of money received from his mother if John just has enough money to buy the model car.(Show your working)
最佳解答:
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1. let the price of an optical mouse is x . SO the price of a mouse pad is (x-55) 3*(x-55) + x =225 3x-165+x =225 4x = 390 x=97.5 so the price of an optical mouse is$97.5 2. let the number of seats in Hall B is x , and the Hall A is 5/6x. x+ 5/6x =220 6x+5x=1320 11x+1320 x=120. so the number of seats in Hall B is 120 ,and Hall A is 5/6(120) =100. 3. 45+ x >= 300 x>= 255 so John has received $255. 2013-04-04 18:09:01 補充： 第3題,我沒看太明白題目.以我理解應該是這樣其他解答:
1. Let the price of an optical mouse be $x 3(x-55)+x=255 3x-165+x=255 4x-165=255 4x=420 x=105 The price of an optical mouse is $105 2.Let the number of seats in Hall A be 5/6x and the number of seats in Hall B be x 5/6x+x=220 11/6(x)=220 x=120 The number of seats in Hall A is 5/6x, x=120, then the number of seats in Hall A is 5/6 times 120=100 , the number of seats in Hall B is 120. 3. The sum of money received from his mother is: 45+x=300 45+x-45=300-45 x=255 The sum of money received from his mother is $255. Hope I can help you with these questions. >,<8081B933AEEFE995
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