The length of a rectangle is x cm .
a) The length is 7 cm longer than the width . Express the width in terms of x
b) The perimeter is 74 cm . Write down an equation in x .
c) Slove the equation in (b) .Hence fin d the dimensions of the rectangle.
Math. F.1
2009-07-18 6:05 pm
回答 (4)
2009-07-19 4:48 am
✔ 最佳答案
a)The width=(x-7)cm
b)The perimeter
[x+(x-7)]2=74
c)Let the length of a rectangle is x
[x+(x-7)]2=74
(x+x-7)2=74
(2x-7)2 =74
4x-14=74
4x=74+14
4x=88
x=22
The length of a rectangle is 22 cm
參考: me
2009-07-18 7:53 pm
The length of a rectangle is x cm .
a) The length is 7 cm longer than the width . Express the width in terms of x
b) The perimeter is 74 cm . Write down an equation in x .
c) Slove the equation in (b) .Hence fin d the dimensions of the rectangle.
x=22
a) The length is 7 cm longer than the width . Express the width in terms of x
b) The perimeter is 74 cm . Write down an equation in x .
c) Slove the equation in (b) .Hence fin d the dimensions of the rectangle.
x=22
參考: ME
2009-07-18 7:44 pm
22cm * 15cm = 330cm^2
2009-07-18 6:26 pm
a. (x-7) cm
b. 2*x+2*(x-70
c. x=22, dimensions = 22*22+15*15= 709's square root = 26.6270539113................................................. to the nearest whole number is 27
2009-07-18 10:29:13 補充：
new information
c. x=22, dimensions means the area ,so should be 22*(22-7)= 22*15=330
b. 2*x+2*(x-70
c. x=22, dimensions = 22*22+15*15= 709's square root = 26.6270539113................................................. to the nearest whole number is 27
2009-07-18 10:29:13 補充：
new information
c. x=22, dimensions means the area ,so should be 22*(22-7)= 22*15=330
參考: myself
收錄日期: 2021-04-21 22:03:24
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