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ICSE Class 10 Answered

7x-2y=5 Xy 8x+7y=15 Xy
Asked by Yogwshyadav8959 | 23 May, 2019, 10:38: PM
answered-by-expert Expert Answer
begin mathsize 16px style 7 straight x minus 2 straight y equals 5 xy space space space.... space left parenthesis straight i right parenthesis 8 straight x plus 7 straight y equals 15 xy space space.... space left parenthesis ii right parenthesis Multiply space left parenthesis straight i right parenthesis space by space 7 space and space left parenthesis ii right parenthesis space by space 2 comma space we space get 49 straight x space minus space 14 straight y space equals space 35 xy space space space... space left parenthesis iii right parenthesis 16 straight x space plus space 14 straight y space space equals space 30 xy space space... space left parenthesis iv right parenthesis Adding space left parenthesis iii right parenthesis space and space left parenthesis iv right parenthesis comma space we space get 65 straight x space equals space 65 xy space space space left parenthesis straight x space not equal to space 0 right parenthesis rightwards double arrow space straight y space equals space 1 space space space space space Put space straight y space equals space 1 comma space rightwards double arrow 49 straight x space minus space 14 left parenthesis 1 right parenthesis space equals space 35 straight x left parenthesis 1 right parenthesis rightwards double arrow space 14 straight x space equals space 14 rightwards double arrow space space space space space straight x space equals space 1 Therefore space straight x space equals space 1 comma space straight y space equals space 1. end style
Answered by Yasmeen Khan | 24 May, 2019, 09:42: AM

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ICSE 10 - Maths
4. Plot A(4,-2) and B(3, 6) in graph. (1) Reflect A and B in origin to get images A' and B' respectively. (ii) Name the figure formed by joining ABA'B'. (iii) State its lines of symmetry.
Asked by kshrugalrawat1 | 29 Sep, 2023, 02:21: AM
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ICSE 10 - Maths
Ramesh had bought 90 shares of the company at Rs.150 per share. Calculate the dividend he receives and the percentage of return on his investment.  
Asked by Sam | 23 Sep, 2023, 09:07: PM
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ICSE 10 - Maths
plz  
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Asked by umarakhtar659 | 22 Sep, 2023, 09:03: PM
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ICSE 10 - Maths
the sum n terms of the series root2+root8+ root 18+root 32
Asked by srilakshmivytla28 | 10 Sep, 2023, 09:19: AM
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ICSE 10 - Maths
sin A- sin B/cosA + cos B + cos A- cos B/ sin A+ sin B =0 prove it
Asked by praggya.srivastava.g1972 | 30 Aug, 2023, 12:50: PM
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ICSE 10 - Maths
ac is sold for 31200 rs gsr 28% find gst and taxable value
Asked by rohini_gk | 20 Jul, 2023, 11:28: AM
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ICSE 10 - Maths
Prove that cot²A - cos²A = cos⁴A . cosec²A
Asked by ritu_parija | 24 Jun, 2023, 07:07: PM
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ICSE 10 - Maths
how is b=0 , in the eqaution : 9a - 3b - 9 = 0 ; where a = 1 .   
Asked by manya.khandelwal94 | 31 May, 2023, 12:05: PM
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ICSE 10 - Maths
(x+1)(2x+8)=(x-7)(x+3)
Asked by ajaykumarnaryal75 | 28 May, 2023, 01:52: PM
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ICSE 10 - Maths
Q 15 from ICSE 10 Selina book Exercise 1(B) A shopkeeper in Punjab buys an article at a printed price of rs 20000 from a wholesaler in Delhi. The shopkeeper sells the article to a customer in Punjab at a profit of 25% on the cost price.
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Asked by sagarmishra | 25 May, 2023, 09:11: AM
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