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The cost of tea A is $30 per kg ,the cost of tea B is $20 per kg . If w kg of tea A and (w+1) kg of tea B are mixed together , and the cost of the mixed tea is $24 per kg. Find w. The height of a small tree is h cm.One month later ,its height increases by 28% to 44.8,find the value of h .PLZ HELP ME TO SOLVE... 顯示更多 The cost of tea A is $30 per kg ,the cost of tea B is $20 per kg . If w kg of tea A and (w+1) kg of tea B are mixed together , and the cost of the mixed tea is $24 per kg. Find w. The height of a small tree is h cm.One month later ,its height increases by 28% to 44.8,find the value of h . PLZ HELP ME TO SOLVE THIS QUESTION IN eng``=] THx ___________
最佳解答:
The cost of tea A is $30 per kg ,the cost of tea B is $20 per kg . If w kg of tea A and (w+1) kg of tea B are mixed together , and the cost of the mixed tea is $24 per kg. Find w. 30w + 20(w + 1) = 24 (w + w + 1) 30w + 20w + 20 = 48w + 24 50w + 20 = 48w + 24 2w = 4 w = 2 The height of a small tree is h cm.One month later ,its height increases by 28% to 44.8,find the value of h . h(1 + 28%) = 44.8 h = 44.8 / (1 + 28%) H = 35
其他解答:
第一條 有無打錯問題!? 如果無打錯的話 w=0.08 the analysis is : 30w+20(w+1)=24 30w+20w+20=24 50w=24-20 50w=4 w=4/50 w=0.08 而第2條. . . the analysis : hx(1+28%)=44.8 h=44.8/1.28 h=35 解釋方面. . . 有唔明先再e-mail我慢慢解你聽
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