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Nairaland Forum / Nairaland / General / Education / I Need Help With This Maths Pls (690 Views)
Who Can Solve This Maths? / Help,solve This Maths. / Great Mathematicians Help Me Solve This Maths Please (2) (3) (4)
I Need Help With This Maths Pls by Coded2(m): 7:17pm On Feb 02, 2020 |
Pls it been 10 years I left school and my kid sister brought this maths for me to solve I have cracked my brain on how to solve it but all seems futile pls nairalander ki dly help me solve this maths simultaneous equation #1 to #5 pls u can send the answers to me on Whatsapp below 1 Like
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Re: I Need Help With This Maths Pls by Coded2(m): 7:21pm On Feb 02, 2020 |
No 5 remaining
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Re: I Need Help With This Maths Pls by Nobody: 8:28pm On Feb 02, 2020 |
Coded2:He used 9 hundred naira notes and 13 fifty naira notes |
Re: I Need Help With This Maths Pls by Coded2(m): 8:54pm On Feb 02, 2020 |
Pls reply guys abeg she is going g to submit it tomorrow morning |
Re: I Need Help With This Maths Pls by Nobody: 10:27pm On Feb 02, 2020 |
Coded2:I am working on it. You can drop a WhatsApp message on this my number so that I can forward the solutions there easily as soon as I am done 1 Like |
Re: I Need Help With This Maths Pls by CNN80: 10:28pm On Feb 02, 2020 |
If someone has already explained how to do No. 1, don't you think that it would be better for your sister to study how it was done and solve the other questions the same way? Doing her homework for her is doing her a great disservice. |
Re: I Need Help With This Maths Pls by Coded2(m): 11:09pm On Feb 02, 2020 |
matex97:thanks I will call u now |
Re: I Need Help With This Maths Pls by ZaRuleOfLaw: 11:12pm On Feb 02, 2020 |
matex97: the number four question tie wrapper oo. I don tire. the rest cheap |
Re: I Need Help With This Maths Pls by McCoy662(m): 11:23pm On Feb 02, 2020 |
Let: number of #50 notes = y Number of #100 notes = x. Then 100x + 50y = 1550...eqn1 x+y= 22...eqn2 From eqn2, x = (22-y)...eqn3 Sub eqn3 to 1 100(22-y) + 50y= 1550 2200 -100y + 50y = 1550 50y = 650 y = 650/50 = 13pcs of #50 From eqn2, x + y = 22 x + 13 = 22 x = 22-13= 9pcs of #100 |
Re: I Need Help With This Maths Pls by Nobody: 11:24pm On Feb 02, 2020 |
Coded2:I have gotten your message |
Re: I Need Help With This Maths Pls by Nobody: 12:09am On Feb 03, 2020 |
ZaRuleOfLaw:It is the same method you used for 2,3 and 5 you will also use |
Re: I Need Help With This Maths Pls by THEbaddest007: 4:20pm On Feb 05, 2020 |
1) x - y = 10 ...... equa(1)
x + 2/3y = 16....... equa (2)
using elimination method
substract equa (1) from (2)
-5/3y =-6
y= -6 * 3/5
y= 18/5
substitute 18/5 for y in equa (1)
x - 18/5 =10
5x - 18 = 50
5x = 50 + 18
5x = 68
x = 68/5
x = 68/5 or 13.6
and y = 18/5 or 3.6 2) 10x + 20y = 6370..... equal (1) x + y = 380 ....... equa (2) using elimination method multiply equa (2) by 10 10x. + 10y = 3800 .... equa (3) substract equa (2) from (3) 10y = 2570 y = 257 substitute 257 for y in equa 2 x + 257 = 380 x = 380 -257 x = 123 3). x + y = 28500 800x + 1250y = 28335000 equa 1 * 800 800x + 1250y = 22800000 equa 2 - 3 450y = 5535000 y = 5535000/ 450 y = 12300 from equa 1 , x + 12300 = 28500 x= 16200 4). 64 x + 44y = 430..... equa 1 x + y = 25...... equa 2 multiply equa 1 by 64 64x + 64 y = 1600..... equa 3 equa 1-3 -20y = -1170 y = 58.5 from equa 2 x + 58.5 = 25 x= -33.5 question 5 have been solved up there. |
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