標題:
中一數學(代數方程+盈利百分率)
發問:
1.Solve the literal equation b-3(a-2)=10 for a. 2.The marked price of a toy car is $58.It is sold at a discount of 20%. (a)Find the selling price of the toy car. (b)If the cost of the toy car is $36,find the percentage profit. 3(a) 5/8(八分之五)x20%+2 3(b)(0.5+10%)x(0.5-10%)
最佳解答:
Q1 b-3(a-2)=10 b-3a+6=10 -3a=-b+4 a=(b-4)/3 Q2 Selling price =$58x(1-20%) =$46.4 Percentage profit =[(46.4-36)/36] x100% =28.9% Q3 (5/8)x20%+2 =(5/8)(20/100)+2 =(1/8)+2 =17/2 (0.5+10%)x(0.5-10%) =(0.5+0.1)x(0.5-0.1) =0.6x0.4 =0.24
中一數學(代數方程+盈利百分率)
發問:
1.Solve the literal equation b-3(a-2)=10 for a. 2.The marked price of a toy car is $58.It is sold at a discount of 20%. (a)Find the selling price of the toy car. (b)If the cost of the toy car is $36,find the percentage profit. 3(a) 5/8(八分之五)x20%+2 3(b)(0.5+10%)x(0.5-10%)
最佳解答:
Q1 b-3(a-2)=10 b-3a+6=10 -3a=-b+4 a=(b-4)/3 Q2 Selling price =$58x(1-20%) =$46.4 Percentage profit =[(46.4-36)/36] x100% =28.9% Q3 (5/8)x20%+2 =(5/8)(20/100)+2 =(1/8)+2 =17/2 (0.5+10%)x(0.5-10%) =(0.5+0.1)x(0.5-0.1) =0.6x0.4 =0.24
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