(1)乙隊(duì)開(kāi)挖到30米時(shí).用了 小時(shí).開(kāi)挖6小時(shí)時(shí).甲隊(duì)比乙隊(duì)多挖了 米,(2)請(qǐng)你求出: 查看更多

 

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有兩段長(zhǎng)度相等的河渠挖掘任務(wù),分別交給甲、乙兩個(gè)工程隊(duì)同時(shí)進(jìn)行挖掘.圖是反映所挖河渠長(zhǎng)度與挖掘時(shí)間之間關(guān)系的部分圖象.請(qǐng)解答下列問(wèn)題:

(1)乙隊(duì)開(kāi)挖到30米時(shí),用了   小時(shí).開(kāi)挖6小時(shí)時(shí),甲隊(duì)比乙隊(duì)多挖了   米;

(2)請(qǐng)你求出:

①甲隊(duì)在的時(shí)段內(nèi),之間的函數(shù)關(guān)系式;

②乙隊(duì)在的時(shí)段內(nèi),之間的函數(shù)關(guān)系式;

③開(kāi)挖幾小時(shí)后,甲隊(duì)所挖掘河渠的長(zhǎng)度開(kāi)始超過(guò)乙隊(duì)?

(3)如果甲隊(duì)施工速度不變,乙隊(duì)在開(kāi)挖6小時(shí)后,施工速度增加到12米/時(shí),結(jié)果兩隊(duì)同時(shí)完成了任務(wù).問(wèn)甲隊(duì)從開(kāi)挖到完工所挖河渠的長(zhǎng)度為多少米?

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有兩段長(zhǎng)度相等的河渠挖掘任務(wù),分別交給甲、乙兩個(gè)工程隊(duì)同時(shí)進(jìn)行挖掘.右圖是反映所挖河渠長(zhǎng)度y(米)與挖掘時(shí)間x(時(shí))之間關(guān)系的部分圖象.請(qǐng)解答下列問(wèn)題:

(1)乙隊(duì)開(kāi)挖到30米時(shí),用了_____小時(shí).開(kāi)挖6小時(shí)時(shí),甲隊(duì)比乙隊(duì)多挖了______米;

(2)請(qǐng)你求出:

①甲隊(duì)在0x6的時(shí)段內(nèi),yx之間的函數(shù)關(guān)系式;

②乙隊(duì)在2x6的時(shí)段內(nèi),yx之間的函數(shù)關(guān)系式;

③開(kāi)挖幾小時(shí)后,甲隊(duì)所挖掘河渠的長(zhǎng)度開(kāi)始超過(guò)乙隊(duì)?

(3)如果甲隊(duì)施工速度不變,乙隊(duì)在開(kāi)挖6小時(shí)后,施工速度增加到12/時(shí),結(jié)果兩隊(duì)同時(shí)完成了任務(wù).問(wèn)甲隊(duì)從開(kāi)挖到完工所挖河渠的長(zhǎng)度為多少米?

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有兩段長(zhǎng)度相等的河渠挖掘任務(wù),分別交給甲、乙兩個(gè)工程隊(duì)同時(shí)進(jìn)行挖掘.如圖是反映所挖河渠長(zhǎng)度y(米)與挖掘時(shí)間x(時(shí))之間關(guān)系的部分圖象.請(qǐng)解答下列問(wèn)題:
(1)乙隊(duì)開(kāi)挖到30米時(shí),用了
 
小時(shí).開(kāi)挖6小時(shí)時(shí),甲隊(duì)比乙隊(duì)多挖了
 
米;
(2)請(qǐng)你求出:
①甲隊(duì)在0≤x≤6的時(shí)段內(nèi),y與x之間的函數(shù)關(guān)系式;
②乙隊(duì)在2≤x≤6的時(shí)段內(nèi),y與x之間的函數(shù)關(guān)系式;
③開(kāi)挖幾小時(shí)后,甲隊(duì)所挖掘河渠的長(zhǎng)度開(kāi)始超過(guò)乙隊(duì).
(3)如果甲隊(duì)施工速度不變,乙隊(duì)在開(kāi)挖6小時(shí)后,施工速度增加到12米/時(shí),結(jié)果兩隊(duì)精英家教網(wǎng)同時(shí)完成了任務(wù).問(wèn)甲隊(duì)從開(kāi)挖到完工所挖河渠的長(zhǎng)度為多少米?

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有兩段長(zhǎng)度相等的河渠挖掘任務(wù),分別交給甲、乙兩個(gè)工程隊(duì)同時(shí)進(jìn)行挖掘.下圖是反映所挖河渠精英家教網(wǎng)長(zhǎng)度y(米)與挖掘時(shí)間x(時(shí))之間關(guān)系的部分圖象.請(qǐng)解答下列問(wèn)題:
(1)乙隊(duì)開(kāi)挖到30米時(shí),用了
 
小時(shí).開(kāi)挖6小時(shí)時(shí),甲隊(duì)比乙隊(duì)多挖了
 
米;
(2)請(qǐng)你求出:
①甲隊(duì)在0≤x≤6的時(shí)段內(nèi),y與x之間的函數(shù)關(guān)系式;
②乙隊(duì)在2≤x≤6的時(shí)段內(nèi),y與x之間的函數(shù)關(guān)系式;
③開(kāi)挖幾小時(shí)后,甲隊(duì)所挖掘河渠的長(zhǎng)度開(kāi)始超過(guò)乙隊(duì)?
(3)如果甲隊(duì)施工速度不變,乙隊(duì)在開(kāi)挖6小時(shí)后,施工速度應(yīng)每小時(shí)增加多少米,才能與甲隊(duì)同時(shí)完成110米的挖掘任務(wù)?

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有兩段長(zhǎng)度相等的河渠挖掘任務(wù),分別交給甲、乙兩個(gè)工程隊(duì)同時(shí)進(jìn)行挖掘.如圖是反映所挖河渠長(zhǎng)度y(米)與挖掘時(shí)間x(時(shí))之間關(guān)系的部分圖象.請(qǐng)解答下列問(wèn)題:
(1)乙隊(duì)開(kāi)挖到30米時(shí),用了______小時(shí).開(kāi)挖6小時(shí)時(shí),甲隊(duì)比乙隊(duì)多挖了______米;
(2)請(qǐng)你求出:
①甲隊(duì)在0≤x≤6的時(shí)段內(nèi),y與x之間的函數(shù)關(guān)系式;
②乙隊(duì)在2≤x≤6的時(shí)段內(nèi),y與x之間的函數(shù)關(guān)系式;
③開(kāi)挖幾小時(shí)后,甲隊(duì)所挖掘河渠的長(zhǎng)度開(kāi)始超過(guò)乙隊(duì).
(3)如果甲隊(duì)施工速度不變,乙隊(duì)在開(kāi)挖6小時(shí)后,施工速度增加到12米/時(shí),結(jié)果兩隊(duì)同時(shí)完成了任務(wù).問(wèn)甲隊(duì)從開(kāi)挖到完工所挖河渠的長(zhǎng)度為多少米?

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