1.Yu travelled 69km by his bike in 5 hours using different speeds. He travelled at 18km/h
for X hours,and 12km/h thereafter.
(i) Yu travelled at 12km/h for ___hours.
(ii) Write an equation for X.
Answer:________
2.There is 5L of water in a bottle.If Jo drank 4x L , and Leon drank half of what Jo drank,how much water is left in the bottle?
MATHS ~急~
2007-02-03 12:54 am
回答 (3)
2007-02-03 1:03 am
✔ 最佳答案
1.(i) Yu travelled at 12km/h for _(5 - X)__ hours.
(ii) 18X + 12(5 - X) = 69
Answer:
18X + 12(5 - X) = 69
6X + 60 = 69
X = 3/2
2. (5 - 4x - 4x/2 ) L = (5 - 6x) L
2007-02-03 1:09 am
1.
[x]x18+[5-[x]]x12=69
18[x]+60-12[x]=69
6[x]=9
[x]=1.5hours
5-1.5
=3.5hours
∴Yu travelled at 12km/h for3.5hours.
Q2.不清楚[4x L]????????????????
2007-02-02 17:12:44 補充：
1. (i)[x]x18 [5-[x]]x12=69 18[x] 60-12[x]=69 6[x]=9 [x]=1.5hours5-1.5=3.5hours∴Yu travelled at 12km/h for3.5hours.1.(ii)Write an equation for X.[x]x18 [5-[x]]x12=69
2007-02-02 17:13:47 補充：
Q2.不清楚[4x L]???????????????? 計到-1,,,靖解清楚,,,,,,
[x]x18+[5-[x]]x12=69
18[x]+60-12[x]=69
6[x]=9
[x]=1.5hours
5-1.5
=3.5hours
∴Yu travelled at 12km/h for3.5hours.
Q2.不清楚[4x L]????????????????
2007-02-02 17:12:44 補充：
1. (i)[x]x18 [5-[x]]x12=69 18[x] 60-12[x]=69 6[x]=9 [x]=1.5hours5-1.5=3.5hours∴Yu travelled at 12km/h for3.5hours.1.(ii)Write an equation for X.[x]x18 [5-[x]]x12=69
2007-02-02 17:13:47 補充：
Q2.不清楚[4x L]???????????????? 計到-1,,,靖解清楚,,,,,,
2007-02-03 1:02 am
1.ii)18X+12(5-X)=69
18X+60-12X=69
6X=9
X=3/2
=1/1/2
i)5-1/1/2
=3/1/2
2.
18X+60-12X=69
6X=9
X=3/2
=1/1/2
i)5-1/1/2
=3/1/2
2.
收錄日期: 2021-04-13 14:44:10
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