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Answers
Answer:
(a) Three words or phrases are given below. Give the meaning of each word as used in the passage. One word answer or short phrases will be accepted. 1) Dispelling II) Pouncing III) Ingenuity (b) Answer the following questions briefly in your own words. What is our attitude towards insects? ii. Why does man try to exterminate insects? iii. Why does the writer say that knowing about insects does not make man change his attitude towards insects? iv.What was the reason that the leaves of the tree were beginning to wither in summer? v. What did the writer do to prevent the ants from reaching the Aphids? Was it successful? (c)Give an apt title to your summary and justify the choice of the title.
Answer:
Step-by-step explanation:
Given that,
1/x + 1/y = 5 and 2/x - 3/y = 4.
Let a = 1/x and b = 1/y.
1/x + 1/y = 5 and 2 (1/x ) - 3 ( 1/y ) = 4
a + b = 5-----eq ( 1 ) and 2a - 3b = 4------eq ( 2 ) ( say )
Now multiply eq ( 1 ) by 2 ,we have
2 ( a + b ) = 2 ( 5 ) ⇒ 2a + 2b = 10-----eq ( 3 ) ( say )
Now subtracting eq ( 3 ) - eq ( 2 ), we get
2a + 2b - ( 2a - 3b ) = 10 - 4
2a + 2b - 2a + 3b = 6 ( ∵- × + = - ; - × - = × )
⇒ 5b = 6
⇒ b = 6/5
Now substituting " b = 6/5 " in tthe eq ( 1 ), we have
a + 6/5 = 5
a = 5 - 6/5 = 25 - 6 / 5 = 19 / 5
∴ 1/x = a = 19/5 ⇒ x = 5/19 and 1/y= b = 6/5 ⇒ y = 5/6.