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F3 Maths -- Need Steps (1)
發問:
F3 Maths Need Steps Thx~1) Dicky is given $65 to buy applesand oranges for a birthday party. An apple costs $2, an orange costs $1.5. a)Find tha max. & min. numbers of fruits he can buy. b) Suppose he decides to buy at least 5 of each type of fruit. Find tha max. no. of the fruits he can buy.2 )Solve... 顯示更多 F3 Maths Need Steps Thx~ 1) Dicky is given $65 to buy applesand oranges for a birthday party. An apple costs $2, an orange costs $1.5. a)Find tha max. & min. numbers of fruits he can buy. b) Suppose he decides to buy at least 5 of each type of fruit. Find tha max. no. of the fruits he can buy. 2 )Solve 2^x+2 - 2^x = 48 3) The selling price of a dozen of eggs is equal to the cost price of 15 eggs. Find the percentage profit.
最佳解答:
a Max no=65/1.5 =43.333.. He can buy 43 fruits Min no=65/2 =32.5 He can buy 32 fruits b Max no=(65-2*5)/1.5+5 =41.1666.....7 Max =41 2 2^(x+2)-2^x=48 (4-1)*2^x=48 2^x=16 x=4 3 (15-12)/12*100%=25% 2007-08-12 12:03:18 補充： Next time,please enter ( ) in index,else the answer may be affected!!I do not know your 2^x 2 is 2^(x 2) of (2^x) 2.Please write clearly. 2007-08-12 12:04:17 補充： b) Max no=(65-2*5)/1.5 5=41.666.....71 is mistyped 2007-08-12 22:52:12 補充： His x represents the constant(like k)
1) a) he buy min no. of fruits if he buy apples only =65/2 =32.5 -> he can buy min 32 fruits he buy max no of fruits if he buy oranges only =65/1.5 =43.33 -> he can buy max 43 fruits b) he buy max no. of fruits if he buy oranges only on top of 5 apples = (65-5*2)/1.5 +5 =41.67 ->he can buy max 41 fruits 2) [你有冇抄錯題目呀!!我改一改個題目黎計啦] 2^(x+2)-2^x=48 2^x * 2^2-2^x=48 2^x (2^2-1)=48 2^x =48/3 xlog2=log 16 (如果未學log的話就咁: 2^x=2^4) x=4 3)let cost price of one egg be x % profit =(15x-12x)/12x * 100% =25%
F3 Maths -- Need Steps (1)
發問:
F3 Maths Need Steps Thx~1) Dicky is given $65 to buy applesand oranges for a birthday party. An apple costs $2, an orange costs $1.5. a)Find tha max. & min. numbers of fruits he can buy. b) Suppose he decides to buy at least 5 of each type of fruit. Find tha max. no. of the fruits he can buy.2 )Solve... 顯示更多 F3 Maths Need Steps Thx~ 1) Dicky is given $65 to buy applesand oranges for a birthday party. An apple costs $2, an orange costs $1.5. a)Find tha max. & min. numbers of fruits he can buy. b) Suppose he decides to buy at least 5 of each type of fruit. Find tha max. no. of the fruits he can buy. 2 )Solve 2^x+2 - 2^x = 48 3) The selling price of a dozen of eggs is equal to the cost price of 15 eggs. Find the percentage profit.
最佳解答:
a Max no=65/1.5 =43.333.. He can buy 43 fruits Min no=65/2 =32.5 He can buy 32 fruits b Max no=(65-2*5)/1.5+5 =41.1666.....7 Max =41 2 2^(x+2)-2^x=48 (4-1)*2^x=48 2^x=16 x=4 3 (15-12)/12*100%=25% 2007-08-12 12:03:18 補充： Next time,please enter ( ) in index,else the answer may be affected!!I do not know your 2^x 2 is 2^(x 2) of (2^x) 2.Please write clearly. 2007-08-12 12:04:17 補充： b) Max no=(65-2*5)/1.5 5=41.666.....71 is mistyped 2007-08-12 22:52:12 補充： His x represents the constant(like k)
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其他解答:1) a) he buy min no. of fruits if he buy apples only =65/2 =32.5 -> he can buy min 32 fruits he buy max no of fruits if he buy oranges only =65/1.5 =43.33 -> he can buy max 43 fruits b) he buy max no. of fruits if he buy oranges only on top of 5 apples = (65-5*2)/1.5 +5 =41.67 ->he can buy max 41 fruits 2) [你有冇抄錯題目呀!!我改一改個題目黎計啦] 2^(x+2)-2^x=48 2^x * 2^2-2^x=48 2^x (2^2-1)=48 2^x =48/3 xlog2=log 16 (如果未學log的話就咁: 2^x=2^4) x=4 3)let cost price of one egg be x % profit =(15x-12x)/12x * 100% =25%
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